ResourceEnvironmental
A Cryogen-Free Method for Monitoring Trace Greenhouse Gases in Air
6 Aug 2014This Application Note shows how Markes’ thermal desorption (TD) technology for analyzing ‘air toxics’ can also be applied to the detection of the most challenging ultra-volatile greenhouse gases, including tetrafluoromethane, hexafluoroethane, sulfur hexafluoride and nitrous oxide. Detection limits below 1 ppt are demonstrated for sulfur hexafluoride and hexafluoroethane, with excellent peak shape and linearity also being obtained.
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Markes International LtdVersatile single-tube analytical thermal desorption unit for GC or GC–MS
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Environmental Monitoring and TestingEnvironmental monitoring and testing uses handheld portable analyzers, kits, spectrometers or chromatography systems for air, water, soil, food and other sample testing. Useful features of analyzers such as BOD and COD include portability, easy calibration, automation and sensitivity. Environmental test kits for pH, water, moisture, etc, should be accurate, sensitive, reliable, fast and easy to use.GC-MS GC-MS (gas chromatography-mass spectrometry) instruments and equipment are used to separate, quantify and identify mixtures of small and volatile compounds, such as polycyclic aromatics, fatty acids and alcohols. Often used in drug detection, forensic investigation and environmental analysis for pesticides and contaminants, GC-MS is a powerful addition to your lab’s analytical capabilities. GC-MS/MS instruments equipped with a qTOF or triple quadrupole analyzers can give greater sensitivity and resolution to your analysis. Find the best GC-MS instruments and equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Thermal DesorptionThermal desorption is a technique used to release volatile compounds from solid samples by heating them. It is often used in environmental testing and analysis of complex materials. Explore thermal desorption systems in our peer-reviewed product directory; compare products, check reviews, and get pricing directly from manufacturers.Volatile Organic Compounds (VOCs)Volatile organic compounds (VOCs) are chemicals that have a low boiling point. Some VOCs are harmful to human health, whereas others can be used to determine the shelf-life of foods samples.