爆炸物
检出限
土工试验
土壤水分
土壤污染
采样(信号处理)
分析化学(期刊)
环境化学
环境科学
黄铜
化学
样品制备
色谱法
土壤科学
铜
滤波器(信号处理)
计算机科学
计算机视觉
有机化学
作者
Lipo Ma,Bin Xin,Yi Chen
出处
期刊:Analyst
[The Royal Society of Chemistry]
日期:2012-01-01
卷期号:137 (7): 1730-1730
被引量:16
摘要
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.
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