ResourceEnvironmental
Going Beyond the Requirements of US EPA Method TO-15: Innovative Cryogen-Free Ambient Air Monitoring of Trace-Level Air Toxics at High Humidity
24 Sept 2017This application note describes the GC–MS analysis of trace-level ‘air toxics’ in humidified canister air, using Markes’ ground-breaking cryogen-free Dry-Focus3 pre-concentration technology. It shows that this system is able to detect 65 target compounds ranging from propene to naphthalene, with method detection limits as low as 0.7 pptv in SIM mode, making it compliant both with standard TO-15 methods, and with ‘trace TO-15’ methods stipulating lower detection limits.
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Infrared / IR SpectroscopyInfrared (IR) spectroscopy measures the interaction of infrared light with a sample, including transmission, reflectance & absorbance, facilitating the identification of analytes. Equipment used for quantitative analysis includes Fourier-transform infrared (FTIR) spectrometers, infrared cameras, FTIR gas analyzers, as well as attenuated total reflectance (ATR) accessories and pellet or film presses. Find the best IR spectroscopy products in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Gas Generators and AnalyzersGas generators are used for supplying or monitoring a regular flow of a high purity gas such as nitrogen, hydrogen or zero air for applications such as gas chromatography. Gas analyzers can be used in supply chain processes and laboratory experiments with portable analyzers for monitoring CO<sub>2</sub> and O<sub>2</sub> levels as well as trace gases. Regular flow can be produced with gas control modules and flow meters. Find the best gas generators and analyzers in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.MALDI-TOF MSMALDI-TOF mass spectrometers (matrix-assisted laser desorption/ionization time-of-flight) are used for the mass analysis of large molecules, including proteins, DNA, polymers and other macromolecules due to its relatively soft ionization, reducing fragmentation whilst allowing fast data acquisition. Tandem mass analyzers such as TOF/TOF systems can be used to increase resolution and sensitivity of your analysis. Find the best MALDI-TOF products in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.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.Air SamplingAir sampling is described as the technique used to capture air for the subsequent purpose of analyzing, typically by thermal desorption, the presence of trace particulates, such as volatile organic compounds (VOCs).Air ToxicsEnvironmental AnalysisEnvironmental analysis describes a variety of tests that determine the effect of chemicals, processes and particulates such as persistent organic pollutants (POPs) have on the environment.Air Quality