Direct mass spectrometric detection of trace explosives in soil samples.
Direct mass spectrometric detection of trace explosives in soil samples.
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DOI：
10.1039/c2an16058g
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发表时间：
2012-03
期刊：
影响因子：
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通讯作者：
Lipo Ma;B. Xin;Yi Chen
中科院分区：
文献类型：
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作者：
Lipo Ma;B. Xin;Yi Chen
土壤中爆炸物的探测在公共安全规划和环境科学中具有重要意义。在本工作中，建立了一种ppb级的方法来直接检测复杂土壤样品中存在的半挥发性炸药RDX和TNT。该方法采用热采样技术和安装有黄铜圆柱电极（9 mm × 4.6 mm id /5.6 mm o.d）的直流常压辉光放电源对样品进行处理，无需样品前处理步骤，如土壤提取（约10小时）。该方法具有操作简便、灵敏度高、速度快等优点，并已在工厂周围和放炮场等不同地点的实际土壤样品中得到验证。每个样品只需要5分钟，在170°C加热的土壤中，检测限降至0.5 ppb （S/N = 3）三硝基六氢-1,3,5-三嗪。它也可扩展到其他挥发性分析物的分析。
The detection of explosives in soil is of great significance in public security programmes and environmental science. In the present work, a ppb-level method was established to directly detect the semi-volatile explosives, RDX and TNT, present in complex soil samples. The method used thermal sampling technique and a direct current atmospheric pressure glow discharge source mounted with a brass cylinder electrode (9 mm × 4.6 mm i.d./5.6 mm o.d.) to face the samples, requiring no sample pretreatment steps such as soil extraction (about ten hours). It was characterized by the merits of easy operation, high sensitivity and fast speed, and has been validated by real soil samples from various locations around a factory or firecracker releasing fields. It took only 5 min per sample, with the limit of detection down to 0.5 ppb (S/N = 3) trinitrohexahydro-1,3,5-triazine in soils heated at 170 °C. It is also extendable to the analysis of other volatile analytes.