首页> 美国政府科技报告 >Impact of Using a High Surface Area Solid Phase Micro Extraction Device and Fast Gas Chromatography Heating Rates in the Sampling and Analysis of Trace Level Chemical Warfare Agents and CWA-Like Compounds
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Impact of Using a High Surface Area Solid Phase Micro Extraction Device and Fast Gas Chromatography Heating Rates in the Sampling and Analysis of Trace Level Chemical Warfare Agents and CWA-Like Compounds

机译:使用高表面积固相微萃取装置和快速气相色谱加热速率对痕量化学战剂和CWa类化合物的取样和分析的影响

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摘要

In the event of a toxic chemical release, such as an incident involving chemical warfare agent compounds, rapid and accurate response is needed to mitigate harm to the public and to emergency responders. The ability to perform rapid air sampling and subsequent fast separation and analysis of the chemical compounds using a fieldable laboratory-quality analytical instrument in order to properly characterize the chemical threat would provide an increased level of awareness and safety. This research discusses the results of applying a newly developed dynamic air sampling technique, known as High- Surface Area Solid Phase Micro Extraction (HSA-SPME), in the sampling and analysis of chemical warfare agent surrogate and degradation compounds. Use of this device at high sample flow rates (4 L min-1) exhibits increased extraction efficiency in terms of mass per unit time relative to traditionally used emergency response detection methods, which is beneficial for decision making and minimizing time in a contaminated environment in a field response scenario when time is of the essence. Use of a tandem HSA-SPME method, in which two devices are joined in series and the sorbent surface area is doubled, permits low detection limits.

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