Naval Research Laboratory, Washington, DC, United States.
Anal Chim Acta. 2013 May 7;776:64-8. doi: 10.1016/j.aca.2013.03.039. Epub 2013 Mar 26.
Successful analysis of particulate/low vapor pressure analytes such as explosives and toxic chemicals, and commercial pesticides require new sampling tools that enable detection of these analytes using current vapor phase detection instruments. We describe a sampling approach that uses stainless steel screens coated with a sticky polydimethyl siloxane (PDMS) coating to capture particulates from surfaces. Preliminary results for the collection of dimethyl methylphosphonate (DMMP) sorbed onto silica gel (SG) particulates (DMMP/SG) from a surface with subsequent analysis by thermal desorption-cylindrical ion trap mass spectrometry (TD-CITMS) are reported.
成功分析爆炸物和有毒化学物质等颗粒/低蒸气压分析物以及商业杀虫剂需要新的采样工具，这些工具可以使用当前的气相检测仪器来检测这些分析物。我们描述了一种采样方法，该方法使用涂有粘性聚二甲基硅氧烷（PDMS）涂层的不锈钢筛网来捕获表面上的颗粒。本文报道了使用热解吸-圆柱离子阱质谱法（TD-CITMS）对硅胶（SG）颗粒上吸附的二甲基甲基膦酸酯（DMMP）（DMMP/SG）进行收集的初步结果。
