HUZLÍK J.1, BUCKOVÁ M.1, JANDOVÁ V.1, ŠPIČKA L.1, POUL A.11 <a target="_blank" rel="noopener noreferrer" href="https://gcms.cz/companies/215">Centrum dopravního výzkumu, v. v. i.</a>, Brnoe-mail: <a href="mailto:jiri.huzlik@cdv.cz">jiri.huzlik@cdv.cz</a>Publikováno také v časopise <a target="_blank" rel="noopener noreferrer" href="https://gcms.cz/companies/39">Chemagazín</a><h4>Úvod</h4>Silniční doprava patří mezi významné zdroje znečištění ovzduší v městském prostředí, přičemž přispívá k pěti třídám hlavních látek znečišťujících ovzduší, a to NOx, částicím (PM), O3, <a target="_blank" rel="noopener noreferrer" href="https://gcms.cz/library?search=VOC">VOC</a> (těkavé organické látky) a CO [1]. Benzen, toluen, ethylbenzen a xylen (<a target="_blank" rel="noopener noreferrer" href="https://gcms.cz/library?search=BTEX">BTEX</a>) patří do skupiny VOC a jsou klasifikovány jako nebezpečné sloučeniny, jejichž toxické účinky na lidské zdraví jsou dobře zdokumentovány. Tyto sloučeniny hrají důležitou roli v chemii atmosféry, protože reagují s oxidem dusičitým za vzniku sekundárních látek znečišťujících ovzduší, jako je ozón. Dalšími zdroji BTEX jsou kromě dopravy také spalování palivového dřeva a uhlí. BTEX se uvolňují také z mnoha spotřebních produktů, jako jsou cigarety, rozpouštědla, barvy a ředidla, stavební materiály, bytové zařízení a pesticidy [2]. Mezi nejvíce nebezpečnou organickou sloučeninu patří benzen, jehož dlouhodobá expozice může vést ke genotoxicitě, hematotoxicitě, rakovině plic, leukémii, poškození jater, ledvin a centrálního nervového systému [3].K odběru plynných vzorků (např. ovzduší, výfukových plynů, emisí) pro následnou analýzu VOC se používají pružné sáčky (vaky) nebo pevné kanystry. Vaky jsou vyráběny z různých materiálů a dle toho se liší svými vlastnostmi, použitím a také obchodními názvy (Tedlar, Altef, FlexFilm, FlexFoil, FluoroFilm FEP). Nejčastěji bývají používány Tedlarové vaky, jejichž materiál je odolný proti pronikání plynů do vaku i ven z vaku a má tloušťku 2 mil (1 mil = 0,001 inch). Vaky z Tedlaru jsou uvedeny v několika EPA metodách a mají zajišťovat výbornou skladovací stabilitu pro širokou škálu těkavých organických látek.Pro experiment sledující stabilitu BTEX ve vzorcích výfukových plynů při uchování v odběrových nádobách byl vybrán Tedlar vak, který je běžně používaný v automobilovém průmyslu při měření emisí. Jako alternativa byl zvolen FlexFoil Plus vak, který je speciálně čištěný, s dobrou skladovací stabilitou pro VOC v rozsahu koncentrací od vyšších úrovní v ppb až po nízké úrovně v ppm, s minimální adsorpcí a absorpcí. Tento vak je ze silného, flexibilního, čtyřvrstvého materiálu o tloušťce 5 mil. Stabilita BTEX byla sledována v 6 časových intervalech po dobu 7-8 dnů. K odběru výfukových plynů bylo využito mobilní měřící zařízení sestrojené ve spolupráci Centra dopravního výzkumu, v. v. i. a firmy SEKO Brno, spol. s r. o., zapojené za automobil, umožňující vzorkování škodlivin v reálném provozu. Cílem práce bylo srovnat stabilitu BTEX v obou vacích a vybrat vhodný odběrový vak pro vzorkování výfukových plynů a také časový interval, během kterého bude muset být analýza BTEX z vaku provedena, což povede k zajištění reprodukovatelných a srovnatelných výsledků.<h4>Přístroje a metody</h4>Měření emisí bylo prováděno s využitím mobilního měřicího zařízení (obr. 1), užitný vzor CZ21385 U1. Mobilní zařízení umožňuje jednak kontinuální měření koncentrací limitovaných polutantů u automobilů a zároveň unikátní řízený odběr vzorků výfukových plynů do vaků a pevných částic na filtr. Při testování v reálném provozu je připojeno za automobil pomocí běžného tažného zařízení. Kompletní proud výfukových plynů je odváděn do měřicího úseku. V zadní části měřicího úseku je izokineticky odebírán reprezentativní vzorek výfukových plynů, který je vysušen a veden do odběrných vaků, umístěných v mobilním zařízení.Vzorky výfukových plynů, nasbírané v rámci experimentu do vaků, byly ihned po ukončení jízdy dopraveny do laboratoře. Odběr vzorků z vaků byl prováděn na termodesorpční trubičky MARC1-AAXX-5020 Cpk X z nerez oceli, náplň Carbopack X (Markes International, Velká Británie) a výsledné hodnoty koncentrací BTEX byly přepočteny na standardní podmínky (tlak 760 torr, teplota 273,15 K). Vzorky výfukových plynů z vaků byly odebírány čerpadlem AirCheck 2000 s průtokem 200 ml·min-1 po dobu 5 minut. První dílčí vzorky byly odebrány ihned po předání vzorků do laboratoře. Následoval odběr po 1, 2, 24 a 48, 168 a 190 hodinách. Při každém odběru byly použity 3 termodesorpční trubičky, které byly plněny bezprostředně po sobě. Koncentrace benzenu, toluenu, ethylbenzenu, o-xylenu a součtu koncentrací m-xylenu a p-xylenu (BTEX) byly stanoveny plynovou chromatografií s hmotnostní detekcí metodou SIM po termální desorpci na termodesorbéru <a target="_blank" rel="noopener noreferrer" href="https://gcms.cz/library?mainauthorItems=10&amp;manufacturerItems=1&amp;search=7667A+Mini+Thermal+Desorber">Agilent 7667A Mini Thermal Desorber</a> (G4370M) podle programu: sušení 1 min, desorpce: startovní teplota 40 °C, nárůst 500°C·min-1 na 325 °C po dobu 1 minuty. Teplota transferline byla 160 °C, teplota ventilu byla 160 °C, průtok nosného plynu helia termodesorbérem byl 50 ml·min-1.Koncentrace jednotlivých škodlivin ve výfukových plynech byly měřeny plynovým chromatografem s hmotnostním detektorem <a target="_blank" rel="noopener noreferrer" href="https://gcms.cz/products/217">Agilent 7890</a>/<a target="_blank" rel="noopener noreferrer" href="https://gcms.cz/products/1232">7010</a> osazeným dvěma kolonami Select PAH, 15 m x 150 µm x 0.1 µm, který pracoval s následujícím teplotním programem:29 °C po dobu 0,5 min; 5 °C·min-1 na 100 °C po dobu 0 min;120 °C·min-1 na 240 °C po dobu 1,133 min.Teplota nástřiku byla 200 °C metodou split 10:1. Jako nosný plyn bylo použito helium He 6.0 (SIAD, Itálie) s konstantním průtokem 0,2 ml·min-1.Vyhodnocení výsledků bylo provedeno s pomocí software QC.Expert 3.3 metodou lineární regrese. Součástí regresní analýzy bylo testování statistické významnosti regresních parametrů, tj. směrnice a absolutního členu regresní přímky, testování významnosti regresního modelu a statistické charakteristiky regrese (koeficient determinace R2). Posouzení stability koncentrací BTEX ve vacích bylo provedeno otestováním lineární a exponenciální závislosti jejich koncentrací na času odběru vzorků. Pro posouzení exponenciální závislosti koncentrací BTEX byla testována lineární regrese mezi přirozenými logaritmy jejich koncentrací a časem odběru vzorků výfukových plynů na termodesorpční trubičky.Obr.1: Mobilní měřicí zařízení<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/CDV_Stabilita_BTEX_z_vyfukovych_plynu_pri_skladovani_ve_dvou_typech_odberovych_vaku_Obr_1_Mobilni_merici_zarizeni_64d480f0d9.jpg" alt="CDV: Obr.1: Mobilní měřicí zařízení." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_CDV_Stabilita_BTEX_z_vyfukovych_plynu_pri_skladovani_ve_dvou_typech_odberovych_vaku_Obr_1_Mobilni_merici_zarizeni_64d480f0d9.jpg 245w," sizes="100vw" width="1205" height="539"><h4>Výsledky a diskuse</h4>Byly sledovány časové závislosti koncentrací benzenu, toluenu, ethylbenzenu, o-xylenu a součtu koncentrací m-xylenu a p-xylenu (BTEX) po jejich odběru do vaků z materiálu Tedlar a FlexFoil Plus. V časových intervalech, které uvádí tab. 1 a tab. 2, byl vždy odebrán jeden litr vzorku na termodesorpční trubičku. Výsledky pro vak Tedlar uvádí tab. 1, výsledky pro vak FlexFoil Plus tab. 2.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/CDV_Stabilita_BTEX_z_vyfukovych_plynu_pri_skladovani_ve_dvou_typech_odberovych_vaku_Tab_1_Vysledky_mereni_koncentraci_BTEX_ve_vaku_Tedlar_4e025a4594.jpg" alt="CDV: Tab. 1: Výsledky měření koncentrací BTEX ve vaku Tedlar." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_CDV_Stabilita_BTEX_z_vyfukovych_plynu_pri_skladovani_ve_dvou_typech_odberovych_vaku_Tab_1_Vysledky_mereni_koncentraci_BTEX_ve_vaku_Tedlar_4e025a4594.jpg 214w," sizes="100vw" width="1379" height="1004"><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/CDV_Stabilita_BTEX_z_vyfukovych_plynu_pri_skladovani_ve_dvou_typech_odberovych_vaku_Tab_2_Vysledky_mereni_koncentraci_BTEX_ve_vaku_Flex_Foil_Plus_1dafdd7f41.jpg" alt="CDV: Tab. 2: Výsledky měření koncentrací BTEX ve vaku FlexFoil Plus." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_CDV_Stabilita_BTEX_z_vyfukovych_plynu_pri_skladovani_ve_dvou_typech_odberovych_vaku_Tab_2_Vysledky_mereni_koncentraci_BTEX_ve_vaku_Flex_Foil_Plus_1dafdd7f41.jpg 208w," sizes="100vw" width="1384" height="1040">Stabilita koncentrací jednotlivých BTEX byla ověřena regresní analýzou. Lineární regresí byly testovány koncentrace BTEX a logaritmy jejich koncentrací.Lepších výsledků při statistickém hodnocení časové závislosti koncentrací BTEX v Tedlarovém vaku bylo dosaženo při testech logaritmů koncentrací (vyšší koeficienty determinace R2), což odpovídá jejich exponenciálnímu poklesu (tab. 3).<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/CDV_Stabilita_BTEX_z_vyfukovych_plynu_pri_skladovani_ve_dvou_typech_odberovych_vaku_Tab_3_Vysledky_porovnani_linearniho_a_exponencialniho_modelu_Tedlar_a895109e42.jpg" alt="CDV: Tab. 3: Výsledky porovnání lineárního a exponenciálního modelu – Tedlar." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_CDV_Stabilita_BTEX_z_vyfukovych_plynu_pri_skladovani_ve_dvou_typech_odberovych_vaku_Tab_3_Vysledky_porovnani_linearniho_a_exponencialniho_modelu_Tedlar_a895109e42.jpg 245w," sizes="100vw" width="1622" height="774">Výsledný model má tedy tvar pro všechny BTEX ve vaku z materiálu Tedlar:c=c0×e(-k×t)Kde:<ul><li>c &nbsp; &nbsp;koncentrace polutantu [µg.m-3]</li><li>c0&nbsp;&nbsp;počáteční koncentrace polutantu [µg.m-3] v čase t=0 [h]</li><li>t&nbsp;&nbsp;&nbsp;&nbsp;doba vzorkování uplynulá od počátku vzorkování [h]</li><li>k&nbsp;&nbsp;&nbsp;&nbsp;časová konstanta [h-1]</li></ul>Výsledné parametry regrese udává tab. 4.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/CDV_Stabilita_BTEX_z_vyfukovych_plynu_pri_skladovani_ve_dvou_typech_odberovych_vaku_Tab_4_Vysledne_parametry_regrese_koncentraci_BTEX_a_casu_9749826f61.jpg" alt="CDV: Tab. 4: Výsledné parametry regrese koncentrací BTEX a času." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_CDV_Stabilita_BTEX_z_vyfukovych_plynu_pri_skladovani_ve_dvou_typech_odberovych_vaku_Tab_4_Vysledne_parametry_regrese_koncentraci_BTEX_a_casu_9749826f61.jpg 245w," sizes="100vw" width="1474" height="236">Koncentrace BTEX měřené ve vaku z materiálu FlexFoil Plus dávaly při lineární regresi statisticky nevýznamné regresní směrnice s koeficienty determinace R2 menšími než 0,2 jak pro koncentrace, tak jejich logaritmy, což lze interpretovat jako nulový pokles koncentrací BTEX ve vaku FlexFoil Plus během doby měření. Stejných výsledků bylo dosaženo při testování lineární regrese pomocí Fisher-Snedecorova testu významnosti modelu, který udával jeho nevýznamnost pro všechny BTEX ve FlexFoil Plus vaku (tab. 5).<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/CDV_Stabilita_BTEX_z_vyfukovych_plynu_pri_skladovani_ve_dvou_typech_odberovych_vaku_Tab_5_Vysledky_porovnani_linearniho_a_exponencialniho_modelu_Flex_Foil_Plus_956dddfd05.jpg" alt="CDV: Tab. 5: Výsledky porovnání lineárního a exponenciálního modelu – FlexFoil Plus." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_CDV_Stabilita_BTEX_z_vyfukovych_plynu_pri_skladovani_ve_dvou_typech_odberovych_vaku_Tab_5_Vysledky_porovnani_linearniho_a_exponencialniho_modelu_Flex_Foil_Plus_956dddfd05.jpg 245w," sizes="100vw" width="1654" height="769">Koncentrace BTEX ve vaku z materiálu FlexFoil Plus je tedy možné považovat během měření za konstantní (střední hodnoty koncentrací viz tab. 2). To znamená, že koncentrace BTEX ve vaku z materiálu FlexFoil Plus byly minimálně po dobu 7 dní stabilní. To potvrzuje i sledování výtěžností jednotlivých BTEX měřených po 48 hodinách od odběru (tab. 6).<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/CDV_Stabilita_BTEX_z_vyfukovych_plynu_pri_skladovani_ve_dvou_typech_odberovych_vaku_Tab_6_Stanoveni_vyteznosti_BTEX_po_48_hodinach_od_odberu_vzorku_3dffc9b39e.jpg" alt="CDV: Tab. 6: Stanovení výtěžností BTEX po 48 hodinách od odběru vzorků." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_CDV_Stabilita_BTEX_z_vyfukovych_plynu_pri_skladovani_ve_dvou_typech_odberovych_vaku_Tab_6_Stanoveni_vyteznosti_BTEX_po_48_hodinach_od_odberu_vzorku_3dffc9b39e.jpg 245w," sizes="100vw" width="1540" height="229">Ve vaku z materiálu Tedlar docházelo během sledování stability BTEX k poklesu jejich koncentrací pravděpodobně vlivem jejich sorpce na stěnách vaku, jejich rozkladu nebo kombinace obou procesů. Ztráta VOC může být mimo fyzikální adsorpci VOC na stěnách vaků způsobena také rozpouštěním VOC ve vodě kondenzované ve vacích, chemickou reakcí, hydrolýzou a biologickou degradací [4]. Časová stabilita koncentrací ve vaku Tedlar pro jednotlivé BTEX klesá v pořadí benzen – toluen – ethylbenzen – meta- + para-xylen, o-xylen, tedy se zvyšující se molekulovou hmotností aromatických sloučenin, jak uvádí tab. 6 pro výtěžnosti po 48 hodinách. Kim et al. uvádí, že relativní výtěžnosti pro benzen a toluen, které mají relativně nízké molekulové hmotnosti, byly trvale vysoké (86–99 % po třech dnech skladování ve vacích), naproti tomu výtěžnosti sloučenin s vysokou molekulovou hmotností (p-xylen a styren) byly nízké s hodnotami 51–81 % po třech dnech skladování [5]. Při srovnání stability polyesterových hliníkových vaků (PEA) a polyvinylfluoridových vaků (PVF, značka Tedlar®) pro odběr vzorků těkavých organických látek je v literatuře uváděna lepší výtěžnost testovaných VOC u PEA vaků než u PVF vaků [5, 6]. Z našich výsledků vyplývá lepší stabilita BTEX ve vaku FlexFoil Plus ve srovnání s Tedlar vakem.Stabilita VOC ve vacích je ovlivněna i dalšími faktory, jako je teplota skladování, koncentrace testovaných látek, relativní vlhkost a také objem naplnění vaku vzorkem. Pro větší výtěžnost VOC se doporučuje naplnit odběrový vak až na 80 % svého jmenovitého objemu [7], je také doporučováno skladovat vak při nižší teplotě, protože sloučeniny skladované při nižší teplotě jsou stabilnější [4].<h4>Závěr</h4>Byly porovnány dva typy vaků – Tedlar a FlexFoil Plus, které byly použity při odběru výfukových plynů mobilním měřícím zařízením za reálného provozu. U vaků byla porovnána stabilita BTEX sloučenin v několika časových intervalech (0, 1, 2, 24, 48, 168 a 190 hod). Výsledky ukázaly dobrou stabilitu FlexFoil Plus vaku po dobu 7 dnů ve srovnání s vakem z materiálu Tedlar, ve kterém docházelo ke snižování koncentrací BTEX s časem, přičemž pro jednotlivé sloučeniny klesala časová stabilita jejich koncentrací v pořadí benzen – toluen – ethylbenzen – meta- + para-xylen, o-xylen. Pro odběr vzorků výfukových plynů pro následné analýzy BTEX je vhodnější FlexFoil Plus vak s optimální dobou analýzy vzorku menší než 7 dní po odběru na trubičky.<h4>Poděkování</h4>Tento článek byl vytvořen za finanční podpory Ministerstva dopravy v rámci programu dlouhodobého koncepčního rozvoje výzkumných organizací.

Stabilita BTEX z výfukových plynů při skladování ve dvou typech odběrových vaků

<div class="___1mdw7yc f22iagw f1vx9l62 f2qmhz0">Zajímáte se o vliv chemických látek na životní prostředí a hledáte odborné informace z první ruky? S velkým potěšením Vás zveme na náš nově připravovaný webinář zaměřený na testování ekotoxicity. Webinářem Vás provede supervizorka ekotoxikologické sekce ALS Czech Republic a odbornice na danou problematiku, Kateřina Vavřinová.Náš nový webinář zaměřený na testy ekotoxicity, Vám poskytne hlubší vhled do této problematiky. Na začátku se seznámíme se základními pojmy a principy ekotoxicity, následně se podíváme na metodologii testování, a nedílnou součástí webináře bude samozřejmě také přehled legislativního rámce, kde probereme aktuální předpisy a vyhlášky ovlivňující testování ekotoxicity.Pomocí praktických ukázek Vám představíme konkrétní příklady a postupy testování, které vám pomohou aplikovat získané znalosti v praxi.Na závěr webináře budete mít možnost položit Kateřině otázky formou chatu.Těšíme se na Vaši účast a diskusi na toto velmi aktuální téma.<h5>Pro koho je webinář určen?</h5>Tento webinář je vhodný pro širokou škálu účastníků, kteří mají o problematiku ekotoxicity a kvality životního prostředí zájem. Rádi přivítáme naše klienty, ekology, odborníky a vědce v&nbsp;oblasti odpadového hospodářství, pracovníci státní správy, laboranty nebo studenty.Zaujal Vás tento připravovaný webinář? Zúčastněte se a můžete si tak rozšířit své znalosti o testování ekotoxicity.Rádi byste se zúčastnili, ale nevyhovuje Vám termín online přenosu? Nevadí! Zaregistrujte se i v&nbsp;tomto případě, záznam webinář bude pro všechny registrované účastníky dále k&nbsp;dispozici ze záznamu.Těšíme se na Vás.Váš tým ALS.</div><blockquote>Přednášející: Kateřina Vavřinová (Ecotoxicology Section SupervisorALS Czech Republic s.r.o.)</blockquote><div class="___1ssnlw3 f22iagw f1vx9l62 f1nicjmu fly5x3f f1l02sjl"><div class="___k6j0wd0 f22iagw f1nicjmu f1vx9l62"><blockquote><div class="___kwg7oq0 f197wrh9 fpfc2by f1rvi9lw f1p9o1ba f1sil6mw f1cmbuwj fokg9q4">Kateřina Vavřinová pracuje jako supervizorka ekotoxikologické sekce v laboratořích ALS v České Lípě.</div></blockquote></div></div>

Webinář ALS Czech Republic: Ekotoxicita

Rádi bychom Vás pozvali na jednodenní hybridní konferenci, která se zaměří na nejnovější trendy a inovace v analýze mikroplastů. Dopolední program bude online přenášen a nahráván, což umožní virtuální účast pro ty, kteří se nemohou zúčastnit osobně.<h3>Program</h3>Dopolední část: Bude zaměřena na klíčové poznatky o <a target="_blank" rel="noopener noreferrer" href="https://gcms.cz/library?mainauthorItems=10&amp;search=microplastics">analýze mikroplastů</a>, stejně jako o <a target="_blank" rel="noopener noreferrer" href="https://lcms.cz/library?mainauthorItems=10&amp;search=PFAS">PFAS</a> a dalších kontaminantech životního prostředí, prostřednictvím prezentací špičkových výzkumníků a odborníků z oboru.Odpolední část: Bude zaměřena na interaktivní workshopy, jejichž cílem je zlepšit vaše praktické dovednosti v přípravě vzorků. To poskytuje jedinečnou příležitost zvládnout pokročilé techniky a metodiky pod vedením profesionálů. Navštivte živé demo na IR QCL založeném na <a target="_blank" rel="noopener noreferrer" href="https://icpms.cz/products/719">8700 LDIR</a>. Kromě toho si užijte prohlídku laboratoře s průvodcem, která nabízí exkluzivní pohled do nejmodernějších zařízení v kampusu HEREON.<h5>9:15 a.m. - Welcome</h5><h5>9:20 a.m. - From Macroplastics to Mesoplastics: Challenges and Solutions</h5><ul><li>Dr. Marion Börger, Agilent Technologies,</li><li>Dr. Andreas Kerstan, Agilent Technologies</li></ul><h5>9:40 a.m. - i3 Membrane Session: Filter Membranes/Packaging - Jacobs</h5><ul><li>Kathrin Hahn, i3 Membrane</li></ul><h5>10:00 a.m. - Exploring Microplastic Sources and Distribution in Australian Soils</h5><ul><li>Subharthe Samandra, University of Melbourne</li></ul><h5>10:20 a.m. - Advancing Analysis: Eurofins' Path to ISO 17025 Accreditation for Microplastics Testing</h5><ul><li>Julia Jäger, Eurofins</li></ul><h5>10:40 a.m. - Coffee Break</h5><h5>11:00 a.m. - Validation and Application of LDIR Imaging to Analyze Microplastics in Marine Samples</h5><ul><li>Lars Hildebrandt, Hereon</li></ul><h5>11:20 a.m. - Applying Multiple Analytical Techniques to Answer Open Questions About Offshore Wind</h5><ul><li>Alexa Zonderman, Hereon</li></ul><h5>11:40 a.m. - Sample-Based Subsampling Strategies to Analyze Large Quantities of Particles in LDIR</h5><ul><li>Manuel Andrade, University La Coruna</li></ul><h5>12:00 p.m. - Beyond the Surface: Spotlight on Plastic [Metal(loid)] Additive Leaching and Unseen Contaminants</h5><ul><li>Ole Klein, Hereon</li></ul><h5>12:20 p.m. - Microplastics back in food- Advantages of Thermal Desorption for a wide range of Samples</h5><h5>12:40 p.m. - Struggling with Solvent Effects During the Analysis of PFAS</h5><ul><li>Dr. Axel Ritter, Agilent Technologies</li></ul><h5>1:00 p.m. - Lunch Break</h5><h5>2:00 p.m. - An Analytical Toolbox to Unravel PFAS Source Fingerprints</h5><ul><li>Frank Menger, Hereon</li></ul><h5>2:20 p.m. - LDIR for Assessment of Microplastics in the VAMAS Ring Trial and Tissue in a Murine Infection Model</h5><ul><li>Christoph Krafft, IPHT</li></ul><h5>2:40 p.m. - Label-Free Infrared Spectroscopic Micro- and Nanoplastics Detection in Complex Matrices</h5><ul><li>Markus Brandstetter, Recendt</li></ul><h5>3:00 p.m. - Break in Dividing the Guests into Subgroups</h5><h5>3:10 p.m. - Lab Visits: Organic Lab, Microplastics Lab, Sample Prep, LDIR, and Other Techniques</h5><h5>4:50 p.m. - Wrap up</h5><h3>Detaily konference</h3><ul><li>Datum a čas: 29. října 2024 od 9:00 do 16:30&nbsp;</li><li>Místo konání: &nbsp;GITZ GmbH, Max-Planck-Straße 2, 21502 Geesthacht, Germany</li><li>Během konference bude zajištěno občerstvení a oběd.</li></ul><a target="_blank" rel="noopener noreferrer" href="https://explore.agilent.com/microplameeting24">Přihlaste se zde</a>Kapacita sálu pro prezenční účast je omezena! Můžete využít i online připojení do streamu konference, ale streamovaná bude jen dopolední část konference. Odpolední program, tedy workshopy, budou probíhat jen prezenčně na místě.Neváhejte a přihlaste se!&nbsp;<blockquote><h3><a target="_blank" rel="noopener noreferrer" href="https://icpms.cz/products/719">Agilent 8700 LDIR chemický zobrazovací systém</a></h3>Agilent 8700 Laser Direct Infrared (LDIR) chemický zobrazovací systém poskytuje nový sofistikovaný přístup k chemickému imagingu a infračervené spektrální analýze. 8700 LDIR byl vyvinut pro použití jak experty, tak laiky a nabízí jednoduchý vysoce automatizovaný postup pro dosažení spolehlivých vysoce rozlišených chemických zobrazení jednotlivých povrchových složek.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/HPST_Obr_1_Agilent_8700_LDIR_system_pro_chemicky_imaging_19f4f9f649/HPST-Obr.-1-Agilent-8700-LDIR-system-pro-chemicky-imaging.jpg" alt="Altium: Agilent 8700 LDIR systém pro chemický imaging" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_HPST_Obr_1_Agilent_8700_LDIR_system_pro_chemicky_imaging_19f4f9f649/thumbnail_HPST-Obr.-1-Agilent-8700-LDIR-system-pro-chemicky-imaging.jpg 245w," sizes="100vw" width="1554" height="684"></blockquote>

Agilent Microplastics Meeting 2024 (žive + online)

Webináře

Životní prostředí

Zdraví

Vědecký článek

Toxikologie

Health

Článek

Video

Nejbližší akce

Základním posláním společnosti ALS je pomáhat našim klientům se kvalifikovaně a informovaně rozhodovat tím, že poskytuje spolehlivá, konzistentní a reprodukovatelná laboratorní data. Zaručujeme spolehlivé výsledky, krátké dodací lhůty, nepřetržitý provoz, odbornou podporu a odběry vzorků.

ALS Czech Republic

Centrum dopravního výzkumu, v. v. i. (CDV), je veřejnou výzkumnou institucí a jedinou výzkumnou organizací v působnosti Ministerstva dopravy. Laboratoř centra dopravního výzkumu Laboratoř životního prostředí, Laboratoř dopravní infrastruktury, Laboratoř dopravního značení.

Centrum dopravního výzkumu (CDV)

Je autorizovaným distributorem společnosti Agilent Technologies pro Českou republiku v oblastech chromatografie (GC, HPLC, UHPLC, kapilární elektroforéza) a hmotnostní spektrometrie (GC/MS, LC/MS, CE/MS), disolučních aparátů, molekulární (UV-Vis, UV-Vis-NIR, fluorescence, FTIR analyzátory a mikroskopy) a atomové spektroskopie (ICP-OES, ICP-MS, AAS), a v neposlední řadě také v oblasti molekulární biologie a genomiky (analýza nukleových kyselin a proteinů, microarray skenery a skla, PCR & RT-PCR, qPCR, řešení pro NGS, reagencie pro mutagenezi a klonování, sondy FISH a další).

Altium International

Separation Science

Agilent Technologies

Bruker

Shimadzu Corporation

Join Agilent and GERSTEL for our annual virtual seminar discussing how you can assure safety, authenticity, and quality of alcoholic beverages. Sharing the latest in technology developments and capabilities, new applications, and customer stories. Topics include distilled beverages, wine and beer. There is something for everyone in this seminar series and we hope to see you there.
Attend live and receive an Agilent GC wine glass!
<h3>Presentation 1: Non-targeted and Targeted Analysis of Spirits Aroma/Flavor Compounds using DHS-GC(-GC)-MS</h3>
Chromatographic analysis of distilled spirits has witnessed a sea change over a recent short period of years. Previous approaches which relied on solvent extraction procedures to enrich the secondary aroma/flavor compounds from the dominant ethanol-water base, can now be replaced by solventless, automated instrumental methods. Such solventless approaches comprise Stir Bar Sorptive Extraction, Static and Dynamic Headspace and Large Volume Injection. These methods rely on the ability of a PTV (Programmable Temperature Vaporization) injector to enrich analytes of interest before transfer to the GC column, while venting unwanted matrix.
Complex GC-MS data files obtained in this way, can also be further processed by powerful filters such as Spectral Deconvolution followed by RI based isolation and verification of identities of aroma/flavor compounds. The sequential progress of the GC-MS data file through these various filters and finally into a chemometric software for investigative discrimination of samples is achieved by simple mouse clicks. This is a very attractive outcome for practicing flavor Chemists and could be regarded as the final fulfillment of what previously could only be an outcome to aspire to.
These solventless techniques can be so efficient, and sometimes give such complex GC-MS data files, that often an additional chromatographic dimension may be required, especially for detection of ultra-trace compounds. This is supplied by chromatographic heart cutting where elution segments from one column are transferred to a second column of different polarity for increased resolution. The necessary instrumental configurations required for this purpose are also available in fully automated format.
Key Learning Objectives/What attendees will learn:
<ul>
<li>Appreciation of how analysis of distilled spirits has moved into a more modern approach using solventless extraction techniques featuring full automation from sample treatment to GC injection.</li>
<li>Aroma Office in conjunction with MS Spectral Deconvolution will be introduced as a powerful combination for filtering and listing of aroma compounds from complex GC-MS data files.</li>
<li>Two-dimensional Gas Chromatography (2D-GC-GC) will also feature as a valuable tool for isolation of key compounds from interfering matrix in extremely complex data files.</li>
</ul>
Who Should Attend: Chemists and Technicians involved in aroma research and analysis
<blockquote>
Presenter: Dr. Kevin Mac Namara (Consultant)
</blockquote>
<blockquote>
Dr Kevin Mac Namara graduated from the National University of Ireland with a speciality in synthetic organic chemistry. He later joined the Irish Government Alcohol Monopoly and subsequently moved to Irish Distillers Group in 1981 as Head of Technical Development where he established a high profile centre for distilled spirits research. When Irish Distillers merged into the global Pernod Ricard Group in 1990 he assumed a much enlarged role and represented Ireland in EU alcohol affairs for many years before retiring in 2012.
</blockquote>
<h3>Presentation 2: A Variety of Extraction Techniques Used to Determine Analytes of Interest in Distilled Spirits</h3>
Analysis of distilled spirits using GC-MS can be challenging due to the multitude of flavor and aroma compounds that exist in the predominantly ethanol-water mixture. The optimal extraction technique or techniques must be able to isolate and pre-concentrate the analytes before introduction into the GC-MS to produce meaningful data. GERSTEL offers numerous automated sample introduction and extraction techniques including Static Headspace (SHS), Solid Phase Microextraction (SPME), Thermal Desorption (TD), Dynamic Headspace (DHS), and Thin Film Solid-Phase Microextraction (TF-SPME) and Pyrolysis. GERSTEL offers additional features to each extraction technique including Multiple Headspace Sample Enrichment (MHSE) and TDx Multidesorption that can provide significantly more mass on column and lower detection limits. GERSTEL also offers unique detection capabilities with the olfactory detection port (ODP) allowing the analyst to smell compounds as they elute from the GC column. With simultaneous mass spectral detection, key odor-active compounds can be identified in complex products.
Common challenges encountered when analyzing distilled spirits include reproducibility of batches, identifying and quantifying off-odors produced during the fermentation process, and consumer satisfaction, especially in the context of competitors, to name a few. This presentation will show how GERSTEL addresses these complex challenges by having a complete “toolbox” of extraction, introduction and detection options that can be combined and optimized as needed.
Key Learning Objectives/What attendees will learn:
<ul>
<li>Theory and applicability of SHS, SPME, SBSE, TF-SPME, DHS, and pyrolysis.</li>
<li>How to decide on the most optimal extraction technique based on research challenges.</li>
</ul>
Who Should Attend: Analytical chemists in the food, flavor, fragrance, and beverage industries
<blockquote>
Presenter: Megan Harper (Applications Scientist l, GERSTEL, Inc.)
</blockquote>
<blockquote>
Megan Harper graduated from the University of Maryland Baltimore County in 2020 with a Bachelor of Science Degree in chemistry and received her Master of Science Degree in forensic science with an analytical chemistry track from Towson University in 2022. At GERSTEL, Inc., Harper applies her knowledge on sample extraction and introduction techniques to help solve complex problems for customers across the USA, including those involving distilled spirits.
</blockquote>

Pixabay/Bruno/Germany: 3rd Annual Alcoholic Beverages Virtual Symposium - Spirits

3rd Annual Alcoholic Beverages Virtual Symposium - Spirits

Non-targeted and Targeted Analysis of Spirits Aroma/Flavor Compounds using DHS-GC(-GC)-MS. Extraction Techniques Used to Determine Analytes of Interest

Join Agilent and GERSTEL for our annual virtual seminar discussing how you can assure safety, authenticity, and quality of alcoholic beverages. Sharing the latest in technology developments and capabilities, new applications, and customer stories. Topics include distilled beverages, wine and beer. There is something for everyone in this seminar series and we hope to see you there.
Attend live and receive an Agilent GC wine glass!
<h3>Presentation 1: Considerations for the Fast Analysis of Smoke Impacted Wines by SPME GC/MS</h3>
With the increase in wildfires over various regions around the globe, many growers and wineries continue to worry about smoke impact in grapes and their wine. Agilent has developed a solid phase microextraction (SPME) gas chromatography/mass spectrometry (GC/MS) method to analyze the free-form volatile phenols associated with smoke impact. With the increase in sample volume and the need to make timely decisions regarding the harvest, laboratories are seeking shorter extraction times and faster GC methods. Techniques such as utilizing salt to increase the volatile compounds partitioning into the headspace, a High Efficiency GC column, and/or a more selective mass spec detector can increase laboratory throughput. This presentation will deliver tips and tricks on increasing sample throughput and maintaining data integrity for smoke impacted wine analysis.
Key Learning Objectives/What attendees will learn:
<ul>
<li>Strategies for analyzing aromatic compounds in wine by SPME</li>
<li>Strategies to speed up your GCMS method</li>
</ul>
Who Should Attend: Laboratory technicians, researchers, and scientists wishing to learn more about SPME-GC(MS) analysis of wine.
<blockquote>
Presenter: Vanessa Abercrombie (Gas Chromatography Applications Chemist, Agilent)
</blockquote>
<blockquote>
Vanessa Abercrombie is a GC Applications Chemist at Agilent Technologies in Folsom, CA. Vanessa has a broad background in GC and GC/MS, including experience as an instrument chemist at Bode Technology in Virginia working under contract to the FBI’s Laboratory Division. Prior to that, Vanessa worked for ETS Labs in St. Helena, CA as an Analytical Chemist where she researched and developed quantitative separations by GC/MS and UHPLC for beer, wine and spirits.
</blockquote>
<blockquote>
Presenter: Jessica Westland (Sample Preparation Application Scientist, Agilent)
</blockquote>
<blockquote>
Jessica Westland is a sample prep application scientist with over 10 years of analytical laboratory experience and a background in method development for GC &amp; GC/MS applications. She works closely with cross-functional teams to support Agilent’s sample preparation products portfolio. Jessica focuses on producing technical data and field support material for all sample prep products which include SPME products and consumables.
</blockquote>
<h3>Presentation 2: Multi Elemental Wine Analysis by MP-AES: Development, Validation and Application</h3>
Finding the right technique for wine analysis can be a difficult decision. This webinar will demonstrate the capabilities of Agilent’s MP-AES 4210 for the fast analysis of wine. Our expert speaker will talk attendees through the development of a new MP-AES method and what applications it can be used for. The efficiency and effectiveness of this method will also be highlighted using an accuracy profile approach. Attendees will also be taken through a case study, able to view occurrence data for white and rosé wines.
Key Learning Objectives/What attendees will learn:
<ul>
<li>Find out about elemental analysis of wines and why it’s important</li>
<li>Learn how the MP-AES method works</li>
<li>Understand the benefits of this technique through an insightful case study</li>
</ul>
Who Should Attend: People in the wine industry interested in learning about how element composition can impact their wine quality.
<blockquote>
Presenter: Fanny Hernandez (Head of the Elemental Analysis Unit, Laboratoires Dubernet)
</blockquote>
<blockquote>
After a PhD thesis on Chromium Speciation in food at the ANSES (French Agency for Food, Environmental and Occupational Health and Safety) Fanny is responsible for the elementary unit analysis at Laboratoires Dubernet since 2017. Her main missions are to develop new analytical tools in order to better understand balances of wines from an agro-oenological approach. 
</blockquote>

Pixabay/Steve Buissinne: 3rd Annual Alcoholic Beverages Virtual Symposium - Wine

3rd Annual Alcoholic Beverages Virtual Symposium - Wine

Considerations for the Fast Analysis of Smoke Impacted Wines by SPME GC/MS. Multi Elemental Wine Analysis by MP-AES: Development, Validation and Application.

Join Agilent and GERSTEL for our annual virtual seminar discussing how you can assure safety, authenticity, and quality of alcoholic beverages. Sharing the latest in technology developments and capabilities, new applications, and customer stories. Topics include distilled beverages, wine and beer. There is something for everyone in this seminar series and we hope to see you there.
Attend live and receive an Agilent GC wine glass!
<h3>Presentation 1: Evolution of malt, hop and fermentation-derived flavor compounds throughout the brewing of a single malt, single hop (SMaSH) ale</h3>
Beer is a complex mixture of volatile and nonvolatile compounds that arise from malt, hops and fermentation by yeast. Some compounds are extracted from malt and hops during mashing and boiling, respectively. Others are products of reactions that occur throughout the brewing process, such as Maillard reactions, Strecker degradation reactions, the isomerization of alpha-acids and the Ehrlich pathway in yeast. The integration of GC/MS and LC/MS data affords the ability to monitor these reactions in real time. Targeted metabolomic techniques were used to show formation of volatile flavor compounds from their nonvolatile precursors, (e.g. amino acids) and the transformation of non-volatile hop-derived compounds, thus providing a detailed picture of flavor development throughout brewing of a single malt, single hop beer.
Key Learning Objectives/What attendees will learn:
<ul>
<li>Integration of SPME GC/MS, HILIC LC/MS and RP LC/MS data to monitor the production of flavor compounds from nonvolatile precursors throughout the beer brewing process</li>
<li>Utilization of targeted metabolomic techniques to identify reaction intermediates produced from nonvolatile precursors en route to volatile flavor compounds</li>
</ul>
Who Should Attend:
<ul>
<li>Those interested in the comprehensive mass spectrometric characterization of precursors and metabolites produced during beer brewing and fermentation</li>
<li>Brewers, brewery chemists, food chemists</li>
</ul>
<blockquote>
Presenter: Christine Hughey (Professor of Chemistry, Department of Chemistry &amp; Biochemistry, James Madison University) 
</blockquote>
<blockquote>
Dr. Hughey is a Professor at James Madison University in Harrisonburg, VA. She is an analytical chemist with expertise in mass spectrometry who has collaborated with food chemists and brewers for over two decades. Her most recent collaboration with the Madison Academic Brewery, housed within the Engineering Department at JMU, has focused on the integration of GC/MS and LC/MS techniques to monitor reactions that produce flavor compounds during brewing and fermentation.
</blockquote>
<h3>Presentation 2: Beer Soluble Hop Compounds: Translating Raw Hop Aroma to Finished Beer</h3>
Translating hop aroma to finished beer aroma has been a brewing challenge for years. Hops have been a primary ingredient in beer for over a thousand years for preservation as well as bittering because of their humulone compounds. That is not the only reason that hops are used in beer the Craft beer industry brought back the use of hops for flavor and aroma to create floral, citrus and fruity beers. Instead of utilizing hops early in the kettle boil for bitterness the brewers utilize hops in late kettle additions, and after primary fermentation to extract the aroma from hops. The goal is to extract the pleasant aroma that one can smell in hops and capture it into the final beer. 
Utilizing an Agilent GC/MS that was outfitted with a Gerstel MPS for the use of Twister stir bars in conjunction with a Thermal Desorption Unit (TDU) for raw hop and beer analysis it was determined that a select handful of hop derived compounds were consistently present in beer samples contributing to the overall flavor and aroma. A second Agilent GC was purchased that was outfitted with a Quadrupole Time-of-Flight (Q-ToF) and a Sulfur Chemiluminescence Detector (SCD). This instrument was also set up with a Gerstel robotic MPS and TDU/CIS. With the addition of the SCD, sulfur-containing compounds became an area of focus along with the select handful of compounds present in beer which are collectively known as the ‘survivables’. These compounds are isobutyl isobutyrate, isoamyl isobutyrate, 2-methylbutyl isobutyrate, methyl geranate, 2-nonanone, geraniol, linalool and 3-mercaptohexanol. The concentrations of these select compounds were determined across the hop varieties YCH supplies and utilize that data to help brewers make more informed decisions about when and what varieties to add during the brewing process to provide the strongest impact to their final beer. This data was to create pellet blends where hop varietals are blended to maximize the ‘survivable’ compounds content, which was released as a new product. 
Most recently, YCH has acquired two more GC/MS systems for quantitative analysis of these ‘survivable’ compounds for all hop products. The new systems are equipped with carousel-style autosamplers with a syringe for liquid injection samples. The aromatics are extracted by steam distillation and the hop oil sample diluted in hexane and injected with the syringe into a high-temperature inlet followed by introduction in the analytical column. With these new systems and developed analytical method, we can offer the analytical data for ‘survivables’ to brewers on all product types. 
Key Learning Objectives/What attendees will learn:
<ul>
<li>A description of the research conducted that started as exploratory research to a final QC analytical methodology.</li>
<li>Methods for using beer soluble hop compound research to design efficient recipes and a blended hop product that targets these compounds.</li>
</ul>
<blockquote>
Presenter: Patrick Jensen (Director of R&amp;D, Yakima Chief Hops LLC)
</blockquote>
<blockquote>
Patrick Jensen has been with YCH for more than five years. He was born in Yakima, Washington and knew nothing of hops and beer until he graduated from Central Washington University with a B.S. in chemistry in 2004. He owned a Thai restaurant where he was the head chef, but soon after graduation ended up in the hop industry. He has managed several hop quality laboratories since and is the Director of Research and Development for Yakima Chiefs Hops. He works to develop analytical methods for hop and brewing research, develops new products and provides technical expertise to our growers, production processes, quality control and sales team. Pat believes all beer is great, because…can you believe I get paid me to do what I love? He lives in Yakima, Washington with his wife, daughter, and twin autistic sons. 
</blockquote>
<blockquote>
Presenter: Jacqueline Brummett (R&amp;D Laboratory Supervisor, Yakima Chief Hops LLC)
</blockquote>
<blockquote>
Jacqueline Brummett is a born and raised Washington resident who graduated from Central Washington University with a BS in Biological Sciences. After working in clinical lab in Seattle, Jacqueline relocated to Yakima and now supervises the Research and Development Lab at YCH. Jacqueline coordinates the analysis to support sensory team and pilot brewery projects in addition to conducting trials to further explore the many facets of hops. Her current area of focus has been on GC/MS method development for hop oil analysis.
</blockquote>

Pixabay/Marcelo Ikeda Tchelão: 3rd Annual Alcoholic Beverages Virtual Symposium - Beer

3rd Annual Alcoholic Beverages Virtual Symposium - Beer

Evolution of malt, hop and fermentation-derived flavor compounds throughout the brewing. Beer Soluble Hop Compounds: Translating Raw Hop Aroma to Finished Beer

Join SepSolve Analytical as they demonstrate how the latest advances in GC×GC hardware and software are extending the capabilities of the technique from the niche to the mainstream.
Flow modulation of the gas stream overcomes the practical difficulties of applying GC×GC for routine analyses and has reduced cost of ownership. Easy-to-use chemometrics tools make life easier by preventing data processing becoming the bottleneck of analytical workflows.
In this presentation, we’ll cover some fascinating examples of real-life applications that have benefited from the separating power of GC×GC, in both research and routine laboratories. These include biomarker discovery, aroma profiling and environmental monitoring:
<ul>
<li>Total petroleum hydrocarbons (TPH) – Robust and routine monitoring of total petroleum hydrocarbons (TPH) in environmental matrices using GC×GC-FID.
</li>
<li>Chemical fingerprinting of pyrolysis oils – Detailed characterisation of pyrolysis oils from solid waste plastics using GC×GC–TOF MS to identify possible contaminants, and help to refine process design.
</li>
<li>Biomarker discovery – Thermal desorption coupled with GC×GC–TOF MS to capture comprehensive breath profiles and uncover potential biomarkers of disease.
</li>
<li>Aroma profiling – Comparison of whisky aroma profiles by SPME–GC×GC–TOF MS to distinguish between whiskies from different regions and evaluate the impact of maturation.
</li>
</ul>
By attending this presentation you will:
<ul>
<li>Learn the basics of GC×GC and what it offers over and above standard GC
</li>
<li>Debunk the myths of GC×GC being a ‘research-only’ tool
</li>
<li>See how cutting-edge software tools can simplify everyday use of GC×GC
</li>
<li>Familiarise yourself with the latest GC×GC applications
</li>
</ul>
Who should attend:
<ul>
<li>GC and GC-MS users who want to enhance their ability to analyse complex samples
</li>
<li>Separation scientists who want to find out more about GC×GC
</li>
<li>GC×GC practitioners wanting to further their knowledge on recent advances in applications, hardware and software
</li>
</ul>
<blockquote>
Presenter: Laura McGregor (Product Marketing Manager, SepSolve Analytical)
</blockquote>
<blockquote>
Laura McGregor received an M.Chem. in chemistry from the University of St Andrews, UK, followed by an M.Sc. in forensic science at the University of Strathclyde, UK. Her Ph.D. in environmental forensics, also at the University of Strathclyde, sparked her interest in GC×GC and she has been a strong advocate of the technique ever since. In her current role as Product Marketing Manager at SepSolve Analytical, she continues to apply GC×GC–TOF MS to challenging applications.
</blockquote>

Separation Science: Demystifying comprehensive two-dimensional gas chromatography (GC×GC)

Demystifying comprehensive two-dimensional gas chromatography (GC×GC)

Examples of real-life applications that have benefited from the separating power of GC×GC, in both research and routine laboratories.

Comprehensive two-dimensional gas chromatography (GC×GC)

Seeing everything, and as low as possible, with GC and MS is a function of selectivity and sensitivity: get as much as you can on column, and as best as you can, don&#39;t favor one set of compounds over another.
At some point a one microliter injection of a sample fails this criteria; what next? Concentration!
We will focus on how to concentrate analytes introduced via liquid, headspace, SPME, thermal desorption, and more, all using the latest advancements in a Peltier cooled, valveless, and simple to understand dynamic focusing system for your GC.
<blockquote>
Presenter: Kurt Thaxton (International Product Manager, Gerstel)
</blockquote>
<blockquote>
Kurt Thaxton is an International Product Manager for GERSTEL, a German manufacturer of thermal desorption, pyrolysis, and other means of sample preparation and sample introduction for GC- and LC-MS.
</blockquote>
<blockquote>
For over twenty years, Kurt has been a user of thermal desorption and pyrolysis as a research scientist at International Paper and later as a Product Specialist for Varian Inc. Later Kurt became involved in both the commercial and technical aspects of these techniques at Markes International and now GERSTEL.
</blockquote>
<blockquote>
Kurt also serves actively in different capacities at SAE, ASTM, AIHA, and ISO. Kurt has an M.S. in Analytical Chemistry from The Ohio State University where he focused on using mass spectrometry to solve analytical problems; MS remains a central interest and focus of Kurt&#39;s work today.
</blockquote>

Agilent Technologies: New Advances in Pre-Concentration for GC-MS: Seeing More and Lower

New Advances in Pre-Concentration for GC-MS: Seeing More and Lower

How to concentrate analytes introduced via liquid, headspace, SPME, thermal desorption, and more, all using the latest advancements in a Peltier.

New Advances in Pre-Concentration for GC-MS

SPME is a powerful technique to measure volatiles and semi-volatiles in aqueous matrices, particularly beverages, surface water, and drinking water.
SPME greatly simplified GC-MS work in these matrices, but over time issues with competitive effects at the fiber surface and limited mass-on-column became a limiting factor, particularly as mass spectrometers became ever more sensitive.
The good news is that microextraction continues to advance with improved variations on classic SPME. We&#39;ll discuss these alternate approaches - SPME Arrow, Thin Film SPME (TF-SPME) and Twister - and show how they can help you see ever lower concentrations and yet limit contributions from the aqueous matrix.
<blockquote>
Presnter: Kurt Thaxton (International Product Manager, Gerstel)
</blockquote>
<blockquote>
Kurt Thaxton is an International Product Manager for GERSTEL, a German manufacturer of thermal desorption, pyrolysis, and other means of sample preparation and sample introduction for GC- and LC-MS.
</blockquote>
<blockquote>
For over twenty years, Kurt has been a user of thermal desorption and pyrolysis as a research scientist at International Paper and later as a Product Specialist for Varian Inc. Later Kurt became involved in both the commercial and technical aspects of these techniques at Markes International and now GERSTEL.
</blockquote>
<blockquote>
Kurt also serves actively in different capacities at SAE, ASTM, AIHA, and ISO. Kurt has an M.S. in Analytical Chemistry from The Ohio State University where he focused on using mass spectrometry to solve analytical problems; MS remains a central interest and focus of Kurt&#39;s work today.
</blockquote>

Agilent Technologies: Beyond SPME: Understanding SPME Arrow, Thin-Film SPME, and Twister

Beyond SPME: Understanding SPME Arrow, Thin-Film SPME, and Twister

Alternate approaches - SPME Arrow, Thin Film SPME (TF-SPME) and Twister.

Understanding SPME Arrow, Thin-Film SPME, and Twister

Per- and polyfluoroalkyl substances (PFAS), an emerging class of toxic anthropogenic chemicals persistent in the environment, are currently regulated at the low part-per-trillion level worldwide in drinking water. Quantification and screening of these compounds currently rely primarily on liquid chromatography mass spectrometry (LC-MS).
To better meet the regulatory demands of rapid screening of these chemicals, the hyphenating of solid phase microextraction (SPME) with direct analysis in real time (DART) will be demonstrated. PFAS analysis screened rapidly by DART on the Bruker EVOQ triple quadrupole using LC free workflows demonstrates a significant increase in productivity whilst also presenting a more economical and a greener solution for the lab.
Join us live for the real-time analysis of PFAS with SPME-DART-MS and discover the power of our cutting-edge instrumentation and technologies. 
<blockquote>
Presenter: William Fatigante (Applications Scientist, DART-MS at Bruker Applied Mass Spectrometry)
</blockquote>

Bruker Applied Mass Spectrometry - Chromatography-Free Screening of PFAS Enabled Through SPME-DART-MS

Chromatography-Free Screening of PFAS Enabled Through SPME-DART-MS

Screening of PFAS Enabled Through SPME-DART-MS

This series is perfect for anyone currently using GC, who&#39;d like to understand more about the technique, the hardware and the data produced.
It&#39;s also suitable for anyone who is new to GC and who&#39;d like to understand more about it. This webinar is designed to overview of the selection of the most common sampling technique outside of liquid injection.
Learning Objectives:
<ul>
<li>Expand your understanding of the versatility of gas chromatography
</li>
<li>Understand the principles and configuration for headspace sampling, SPME, thermal desorption (TD), pyrolysis and gas sampling valves (GSVs)
</li>
<li>Explore the various applications that these techniques can be used for
</li>
</ul>
<blockquote>
Presenter: Ollie Stacey (GC/GCMS Technical Specialist, Shimadzu UK)
</blockquote>

Shimadzu: Alternatives to Liquid Injection for Gas Chromatography

Alternatives to Liquid Injection for Gas Chromatography

The selection of the most common sampling technique outside of liquid injection.

Join Agilent and GERSTEL for a 3-day live virtual seminar discussing how you can assure safety, authenticity, and quality of alcoholic beverages. The focus will be on sharing the latest in technology developments and capabilities, new applications, and customer stories.<h4>Presentation 1: Use of FTIR Technology for the Analysis of Sugars and Sweeteners in the Production of Alcoholic Beverages</h4><ul><li>Rogelio García Juárez, Pre-Sales Application Engineer – Agilent Technologies</li></ul>Currently, fast, and accurate methods are required for the analysis of raw materials and various sources to produce alcoholic beverages, for the rapid identification and quantification of these materials, let's review FTIR technology for process controls, as the ideal alternative to other techniques such as HPLC.<h5>Key Learning Objectives/What attendees will learn:</h5>1. The use of Fourier Transform Infrared (FTIR) Technology in applications for the alcoholic beverage industry.2. Analysis for the identification and release of raw materials used in preparation of Spirits.3. Quick methods to determine the concentration of sugars and sweeteners for process control.<h5>Who Should Attend:</h5><ul><li>Producers of alcoholic beverages, distillates, prepared liqueurs, juices, and extracts.</li></ul><h4>Presentation 2: GC-MS Techniques for the Determination of 2-Methylisoborneol and Geosmin in Finished Whiskey</h4><ul><li>Nicole Kfoury, Applications Scientist, GERSTEL,Inc.</li></ul>2-Methylisoborneol (MIB) and geosmin are naturally occurring metabolites formed by bacteria and fungi, most often in surface water sources. They have musty/earthy odors and very low odor thresholds, meaning they can be smelled at concentrations of 1-10 ppt in water. As a result, products, such as whiskey, that use contaminated water in the process may have musty, earthy odors in the finished product. Due to the complexity of the whiskey matrix and the low odor threshold of MIB and geosmin, they can be challenging to quantify accurately. This work shows that a selectable, heartcutting 1D/2D-GC-MSD is required to accurately quantify MIB and geosmin in finished whiskey. &nbsp;<h5>Key Learning Objectives/What attendees will learn:</h5>1. Overview of solid phase microextraction (SPME) versus stir bar sorptive extraction (SBSE).2. Overview of multidimensional, heartcutting GC-MS.3. How to accurately measure the concentration of 2-methylisoborneol and geosmin in complex samples such as whiskey.<h5>Who Should Attend:</h5><ul><li>Analytical chemists in the food, flavor, fragrance, and beverage industries.</li></ul><blockquote>Presnter: Rogelio García Juárez (Pre-Sales Application Engineer, Agilent Technologies)Rogelio García is an Applications Engineer for Molecular Spectroscopy in UV-Vis, FTIR, and Raman techniques at Agilent México and Latin America. Rogelio has a Bachelor’s Degree in Pharmaceutical Chemistry and a Master´s Degree in Environmental Engineering. He has worked in several developments of methods and applications in water, soil, and air, as well as in method design for the Pharmaceutical and Food industry. In this last one, he has developed an outstanding application method for alcoholic beverages such as Tequila using FTIR technology.Presnter:&nbsp;Nicole Kfoury, Ph.D. (Applications Scientist, GERSTEL, Inc.)Dr. Nicole Kfoury is an Applications Scientist at GERSTEL, Inc. in Baltimore, MD. She joined GERSTEL after receiving her Ph.D. in Analytical Chemistry at Tufts University and working as a Research Scientist at the Tufts University Sensory and Science Center. She is responsible for developing methods for sample preparation and gas chromatography-mass spectrometry and creating a Sensory Directed Analysis program at GERSTEL. She teaches customer training, supports pre- and post-sales opportunities, and provides analytical support to customers in a wide array of industries including food, flavor, fragrance, forensic, environmental, and chemical industries.</blockquote>

Agilent Technologies: Alcoholic Beverages Virtual Symposium: Spirits

Alcoholic Beverages Virtual Symposium: Spirits

How you can assure safety, authenticity, and quality of alcoholic beverages.

Join Agilent and GERSTEL for a 3-day live virtual seminar discussing how you can assure safety, authenticity, and quality of alcoholic beverages. The focus will be on sharing the latest in technology developments and capabilities, new applications, and customer stories.<h4>Presentation 1: Comparison of Headspace GC-MS Techniques to Characterize Volatile Phenols contributing to Smoke Taint in Pinot Noir Wines</h4><ul><li>Stephen Toth, GCMS Specialist in the Structure Elucidation Department – International Flavors &amp; Fragrances (IFF)</li></ul>A series of volatile phenols originating from smoke tainted grapes exposed to regional fires have been known to exhibit undesirable sensory characteristics such as smoky, burnt, ashy and medicinal flavoring in affected wines. This can be negatively perceived by consumers and often leads to an aftertaste of these characteristics lingering in the mouth after the wine has been swallowed. Wildfires plagued the counties in northern California and Oregon during the 2020 wildfire season from August through October. These fires severely impacted the grape harvest and challenged wine makers as many of their vineyards were either destroyed or their crops were contaminated with smoke taint. Numerous wineries opted to release limited amounts of 2020 Pinot Noir for this reason or produce rosé or white wines from affected grapes. Our research will look specifically at three different vintages (2019, 2020 and 2021) of Pinot Noir from the same vineyard in the Willamette Valley region of Oregon. It should be noted that “smoke” as an indicator of taste in wines is not always an indicator of smoke taint but can also be imparted into the wine by aging in oak barrels.We will compare headspace based GCMS techniques to characterize these wines and profile the volatile phenol content. Solid phase micro extraction (SPME) and stir bar sorptive extraction (SBSE) will be used to analyze both free volatile content and gylcosidically bound phenolic content. The free volatiles will be acquired in unaltered wine to best represent the consumer’s initial experience. These samples will then experience a pH adjustment, sonication and heat treatment to release gylcosidically bound phenolic compounds which could potentially be released over time by aging the wine.Our research will characterize the phenolic compounds contributing to the smoke taint odor and flavor present in the Pinot Noirs against the sugar bound compounds that can potentially release over the shelf life of the wine utilizing SPME and SBSE extraction methods. Additionally, the comparison of vintages will indicate whether the phenolic characteristics obtained by GCMS can be used to capture the smoke defect in the wine profile from 2020.<h5>Key Learning Objectives/What attendees will learn:</h5>1. Theory and applicability of SHS, SPME, SBSE, TF-SPME, DHS, and pyrolysis.2. How to decide on the most optimal extraction technique based on research challenges.<h4>Presentation 2: An Exploration of Phenolics in Red Wines: Chemical and Sensory Effects of Selected Winemaking Techniques</h4><ul><li>Dr. L. Federico Casassa, Associate Professor, Enology, Cal Poly</li></ul>This presentation discusses how the winemaker can manage winemaking elements – those over which we have control – to develop, evolve and enhance mouthfeel, with focus on phenolic compounds in grapes and wines from the Central Coast of California. The discussion then covers which elements can be leveraged and managed during the production of the wine. There are known protocols for grapes, yeast, fermentation, and aging. However, the challenge for the winemaker is to understand how our various treatments affect the end product. This presentation covers the effects of fermentation temperatures, cold soaking and how the manipulations of these elements can be used to modulate astringency and mouthfeel in the wines.<blockquote>Presenter: Stephen Toth (GCMS specialist in the Structure Elucidation Department, International Flavors &amp; Fragrances (IFF))Stephen Toth is a GCMS specialist in the Structure Elucidation Department at International Flavors &amp; Fragrances (IFF) in Union Beach, NJ. He has spent his lengthy career at IFF working in fragrance delivery, chromatography and ultimately in the mass spectrometry group where part of his role is scouting out new technologies. He is very active in the Agricultural and Food Chemistry Division of the American Chemical Society and currently serves as the treasurer and executive board member. He has edited multiple books and has organized several analytical and flavor chemistry symposia at national meetings. He also serves as a graduate student mentor for the division. He holds a B.S. and M.S in chemistry from Seton Hall University and a Ph.D in food science from Rutgers University.Presenter:&nbsp;Dr. L. Federico Casassa (Associate Professor, Enology, Cal Poly)Dr. Casassa’s research focus lies on the broad areas of grape and wine chemistry and biochemistry and their sensory implications, with especial emphasis on applied research. He has been involved in research projects focusing on the impact of irrigation techniques, especially Regulated Deficit Irrigation. Current and ongoing research projects include studies on the extraction of phenolics of sensory relevance during the course of different maceration techniques in red wines, coupled with other regulating factors and their sensory impact as evaluated by formal sensory evaluation techniques.</blockquote>

GCMS webináře se zaměřením na SPME | LabRulez GCMS

Alcoholic Beverages Virtual Symposium: Wine