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SPME and SPME Arrow are widely used, but did you know that you can desorb your sample via a focusing trap to improve the analysis? Introducing the sample via a trap provides a re-focusing step, for efficient desorption to the GC. This increases signal to noise, provides cleaner spectra and therefore an increase in confidence of identification. This is particularly important for trace-level components that may be small in abundance but have a low odour threshold.   Here is an example of a headspace extraction from a cola beverage comparing SPME Arrow injected to GC inlet, with the Arrow being desorbed via a multi-bed sorbent trap. Peaks that meet our identification criteria* have been labelled with numbers, while unlabelled peaks could not be identified. As you can see, >30 more compounds were tentatively identified when we desorbed via the trap using this criteria, many of which are aroma-active. Unique to the SPME Arrow-trap workflow includes compounds such as ß-Myrcene (“peppery, terpenic, spicy, balsamic”), Geraniol (“soapy waxy aldehydic citrus green”) and Isopulegol acetate (“woody, sweet, peppermint”) amongst others. *NIST match factor of at least 750 in at least 3 of 5 replicates

🌱 If you’re in the agricultural sector, how can you monitor the state of soil to ensure its health and fitness for purpose? After all, soil quality is vital in determining the productivity, sustainability, and overall success of farming practices – from crop growth quality to carbon sequestration. Unexpected weather events such as flooding, temperature changes, and high winds can have a major impact on soil conditions, leading to problems with farming and biodiversity. 👩🔬 Markes’ Application Scientist Lucy Hearn answers this question in her new blog post: The science beneath your feet - untargeted approaches to volatile organic compound (VOC) emissions from soil. In the post, Lucy explains why VOC extraction is important for soil analysis, and how to use VOC profiles to understand soil quality. She also compares two different VOC extraction techniques, both of which are solvent-free: SPME (solid phase microextraction) with multi-step enrichment (MSE), and HiSorb (high-capacity sorptive extraction). Link is in the comments below ⬇️

I just wanted to share some potentially positive news regarding #MicroplasticAnalysis that has come to my attention from my colleagues in China. Plastic pollution is a growing concern worldwide and #Microplastics have been found to pollute our oceans, soil, air, drinking water, food and blood! Sewage treatment plants (STPs) are crucial in removing microplastics from wastewater but are not specially designed to target microplastics. To address this issue and improve the microplastic removal efficiency of STPs, researchers in China have developed a novel approach to their analysis. Using this technique an average of 95.8% microplastics (by mass) was reported to be removed from the influent by the STP. The technique detailed in the paper below uses a tubular furnace heated to 550 ◦C for complete polymer pyrolysis with the pyrolysis products collected on an adsorbent tube for analysis by TD-GC-MS: https://lnkd.in/e4WJA5gX

Die Markes International GmbH präsentierte sich gestern auf dem 8. Analytiktag beim Institut für Umwelt & Energie, Technik & Analytik e. V. (IUTA). Carlos Gil und Dr. Klaus-Peter Sandow standen den Anwendern und Interessierten Rede und Antwort zu Themen wie #Thermodesorption, #Probenanreicherung, #Probenextraktion sowie der zweidimensionalen Gaschromatographie (#GCxGC). Die Veranstaltung bot eine hervorragende Gelegenheit, innovative Lösungen vorzustellen und wertvolle Einblicke in die neuesten Entwicklungen der analytischen Chemie zu gewinnen. Die rege Teilnahme und das Interesse an unseren Technologien zeigen, wie wichtig der Austausch von Wissen und Erfahrungen in diesem Bereich ist. Wir freuen uns bereits darauf, auch im kommenden Jahr wieder an diesem spannenden Event teilzunehmen und unsere Expertise mit Fachkollegen zu teilen. Bleiben Sie gespannt auf weitere Informationen zu unseren zukünftigen Aktivitäten! #IUTA #markesinternational #umwelt

💡 TF-SPME is a sampling technique that uses carbon mesh sheets impregnated with sorbent phase(s). It’s similar to the well-known technique of SPME, but relative to fiber SPME, both the volume of extraction phase and the surface area to volume ratio are significantly larger due to its flat planar geometry and sorbent phase concentration. Like SPME, it can be used to extract volatile and semi-volatile analytes from solids and liquids, using immersive or headspace techniques, often with higher sensitivity – making it an ideal sampling tool for ultra-trace level analysis. It’s also very flexible and therefore robust for use in harsh environments. #AnalyticalChemistry #SamplePreparation

🤩 𝗖𝗵𝗲 ECOMONDO - ITALIAN EXHIBITION GROUP 𝗮𝗯𝗯𝗶𝗮 𝗶𝗻𝗶𝘇𝗶𝗼! Vi aspettiamo al 𝗣𝗮𝗱𝗶𝗴𝗹𝗶𝗼𝗻𝗲 𝗗𝟲-𝗦𝘁𝗮𝗻𝗱 𝟭𝟬𝟮 con il nostro portfolio completo di proposte per soddisfare ogni esigenza analitica. ❗️Non perdere inoltre i nostri appuntamenti di oggi: 👉 𝗠𝗮𝗿𝘁𝗲𝗱𝗶̀ 𝟱 𝗻𝗼𝘃𝗲𝗺𝗯𝗿𝗲 𝗱𝗮𝗹𝗹𝗲 𝗼𝗿𝗲 𝟭𝟭.𝟰𝟱 𝗮𝗹𝗹𝗲 𝟭𝟮.𝟬𝟬, Convegno "Aria indoor: il ruolo nel rapporto ambiente e salute" presso la Sala Malatesta, Pad. D8 - Presentazione Orale di Daniele Morosini: “𝘚𝘶𝘴𝘵𝘢𝘪𝘯𝘢𝘣𝘭𝘦 𝘴𝘢𝘮𝘱𝘭𝘦 𝘤𝘰𝘯𝘤𝘦𝘯𝘵𝘳𝘢𝘵𝘪𝘰𝘯 𝘧𝘰𝘳 𝘪𝘯𝘥𝘰𝘰𝘳 𝘢𝘪𝘳 𝘮𝘰𝘯𝘪𝘵𝘰𝘳𝘪𝘯𝘨” 👉 𝗠𝗮𝗿𝘁𝗲𝗱𝗶̀ 𝟱 𝗻𝗼𝘃𝗲𝗺𝗯𝗿𝗲 𝗱𝗮𝗹𝗹𝗲 𝟭𝟰.𝟬𝟬 𝗮𝗹𝗹𝗲 𝟭𝟳.𝟯𝟬, Convegno "Emissioni odorigene: dalle tecnologie di abbattimento alle nuove strategie di controllo" presso la Sala Malatesta, Pad. D8 -Presentazione del Poster di Daniele Morosini: “Trace Level Odour Monitoring” 👉 𝗠𝗮𝗿𝘁𝗲𝗱𝗶̀ 𝟱 𝗻𝗼𝘃𝗲𝗺𝗯𝗿𝗲 𝗱𝗮𝗹𝗹𝗲 𝟭𝟬:𝟭𝟱 𝗮𝗹𝗹𝗲 𝟭𝟯:𝟬𝟬, Convegno "Aria indoor: il ruolo nel rapporto ambiente e salute" presso la Sala Malatesta, Pad. D8 - Presentazione del Poster di Daniela Peroni: “𝘔𝘰𝘯𝘪𝘵𝘰𝘳𝘢𝘨𝘨𝘪𝘰 𝘥𝘦𝘭𝘭𝘢 𝘲𝘶𝘢𝘭𝘪𝘵𝘢̀ 𝘥𝘦𝘭𝘭'𝘢𝘳𝘪𝘢 𝘢𝘮𝘣𝘪𝘦𝘯𝘵𝘦: 𝘳𝘪𝘭𝘦𝘷𝘢𝘮𝘦𝘯𝘵𝘰 𝘥𝘪𝘳𝘦𝘵𝘵𝘰 𝘥𝘪 𝘗𝘍𝘈𝘚” Agilent Technologies - Markes International - ePrep - GERSTEL GmbH & Co.KG - EST Analytical & TSHR - Axcend - VICI - TOFWERK - #SRAInstruments - Frontier Laboratories Ltd., Japan #ecomondo2024

🧑💻 Join our webinar on 6 November and find out about the regulations driving the evolving scope of ODS and GHGs monitoring – and how to meet the analytical challenges caused by those changing regulations. ODS (ozone depleting substances) and GHGs (halogenated greenhouse gases) – often classified as F-gases – pose a significant threat to both the environment and public health. As regulatory demand to monitor them increases, so too does the need for advanced analytical processes to enable it. Our environmental air monitoring expert Hannah Calder will go through the regulatory developments and the challenges current technologies have in meeting them – primarily because they’re designed for background environmental measurements, which makes them inherently less suitable for high-throughput analysis or real-time industrial monitoring – both of which are crucial for detecting pollution events. By contrast, thermal desorption (TD)–GC–MS systems are ideal for monitoring F-gases – and Hannah will explain why. Plus, she’ll discuss our new NuVo 200, an instrument that we designed specifically for monitoring F-gases at industrial and urban locations. It provides the sensitivity needed to detect changes from background concentrations, and the time-resolution to sample multiple times per hour. You can find a link to the registration page for the webinar in the comments section ⬇️

Happy Halloween! With Nick van Noorden's creative genius, I really want to bust some spooky stories! Zombie facts, monster myths… call them what you will. Chances are, if you use GC or Thermal desorption (TD) you will probably have come across some of these misleading and incorrect pieces of information” – that despite being debunked, seem to persist… 🎃 Zombie Fact 1 – “Liquid cryogen is the only way to trap VOCs” No need for the ghost of cryogen past. Modern Peltier-cooled TD systems trap volatile compounds without the cost or complexity of cryogen. 🎃 Zombie fact 2 – "TD only allows you to analyse a sample once.” Let’s bust this monster myth. Modern TD systems allow you to re-collect and split samples, enabling sample archiving for multiple analyses from the same sample.   🎃 Zombie fact 3 – "Valves and transfer lines get fouled up and are expensive to maintain.” Don’t let this vampire suck your budget dry! Modern TD systems use inert, uniformly heated valves and lines, eliminating fouling and the need for expensive replacements. 🎃 Zombie Fact 4 – "Thermal desorption is just for air samples” This myth has been lurking for too long. Thermal desorption is not just for environmental air sampling – it’s a versatile tool for analyzing liquids, solids, and even breath samples.   🎃 Zombie fact 5 – “TD is for targeted analysis only.” Don’t let this zombie fact haunt your lab any longer. Modern TD systems benefit from backflush operation (desorption in the reverse direction to sampling) which enables use of multiple sorbent beds, expanding the range of VOCs that can be analysed from a single sample to allow the analysis of targeted and untargeted compounds.   Read our "Busting the Zombie facts guide" below to banish some of these Zombie Facts once and for all!

👐 CBRNe Convergence has now formally begun! If you’re there in Orlando, don’t forget to visit us on booth 314. Ken Hellstern and Mark Bieganski will be happy to help with any analytical challenges you may face. Plus, they’re exhibiting our newest advanced thermal desorber for near-real-time monitoring of airborne chemical vapours. This third-gen system delivers lab-grade performance in remote and mobile stations by: ✔️ Eliminating blind spots with continuous data collection. ✔️ Fast, sensitive detection with cycle times as short as 5-10 minutes. ✔️ Operating cylinder-free, with award winning Multi-Gas technology and electrical cooling. ✔️ Enabling remote, unattended monitoring for field deployment. ✔️ Supporting both selective monitoring and broad-spectrum screening for targeted monitoring or broad screening. Be sure to speak to Ken and Mark to find out more 💡

Una gamma completa di sistemi di 𝗱𝗲𝘀𝗼𝗿𝗯𝗶𝗺𝗲𝗻𝘁𝗼 𝘁𝗲𝗿𝗺𝗶𝗰𝗼 per diverse esigenze applicative: dal monitoraggio dei 𝗖𝗼𝗺𝗽𝗼𝘀𝘁𝗶 𝗢𝗿𝗴𝗮𝗻𝗶𝗰𝗶 𝗩𝗼𝗹𝗮𝘁𝗶𝗹𝗶 (𝗩𝗢𝗖) 𝗲 𝗣𝗙𝗔𝗦 in aria, all'analisi di 𝗖𝗼𝗺𝗽𝗼𝘀𝘁𝗶 𝗦𝗲𝗺𝗶𝘃𝗼𝗹𝗮𝘁𝗶𝗹𝗶 (𝗦𝗩𝗢𝗖) in materiali. La tecnologia Markes International Multi-Gas consente il funzionamento delle linee TD anche con idrogeno. Sullo stand troverai 𝗖𝗜𝗔 𝗔𝗱𝘃𝗮𝗻𝘁𝗮𝗴𝗲-𝘅𝗿, l'autocampionatore per l’analisi automatizzata di VOC in aria campionata in canister, sacche e tubi. 👉Scopri di più: https://lnkd.in/dpnHvx7d 🌱 Ti aspettiamo a ECOMONDO - ITALIAN EXHIBITION GROUP, 𝗦𝘁𝗮𝗻𝗱 𝟭𝟬𝟮 - 𝗣𝗮𝗱. 𝗗𝟲 per mostrarti la nostra gamma completa di sistemi di desorbimento termico per diverse esigenze applicative. #SRAInstruments #analyticalsolutions #desorbimentotermico #VOC #SVOC #PFAS #ecomondo2024