Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States.
Anal Chem. 2011 Sep 15;83(18):7115-22. doi: 10.1021/ac2014299. Epub 2011 Aug 18.
The mass spectral detection of low vapor pressure, inorganic-based explosive signatures including ammonium nitrate, chlorate, perchlorate, sugar, and the constituents contained within black powder are reported using laser electrospray mass spectrometry. The ambient pressure mass spectrometry technique combining nonresonant, femtosecond laser vaporization with electrospray postionization revealed primary and secondary signatures for trace quantities of inorganic explosives. A mixture of complexation agents in the electrospray solvent enabled the simultaneous detection of vaporized cations, anions, and neutrals in a single measurement. An offline classifier discriminated the inorganic-based explosives based on the mass spectral signatures resulting in high fidelity identification.
激光电喷雾质谱法检测了包括硝酸铵、氯酸盐、高氯酸盐、糖以及黑火药成分在内的低蒸气压无机爆炸物特征物。该常压质谱技术将非共振飞秒激光蒸发与电喷雾后电离相结合，揭示了痕量无机爆炸物的主要和次要特征物。电喷雾溶剂中的络合剂混合物使得在单次测量中能够同时检测到汽化的阳离子、阴离子和中性物质。离线分类器根据质谱特征区分无机爆炸物，从而实现高保真度的识别。
