Large-volume sampling and preconcentration for trace explosives detection.

Linker, Kevin Lane

Sandia National Laboratories

关键词: Sample Preparation;    Sensitivity Explosives-Detection.;    37 Inorganic, Organic, Physical And Analytical Chemistry;    Sampling;    Trace Amounts;   

DOI  :  10.2172/919138
RP-ID  :  SAND2004-2117
RP-ID  :  AC04-94AL85000
RP-ID  :  919138

美国|英语

来源: UNT Digital Library

【 摘 要 】

A trace explosives detection system typically contains three subsystems: sample collection, preconcentration, and detection. Sample collection of trace explosives (vapor and particulate) through large volumes of airflow helps reduce sampling time while increasing the amount of dilute sample collected. Preconcentration of the collected sample before introduction into the detector improves the sensitivity of the detector because of the increase in sample concentration. By combining large-volume sample collection and preconcentration, an improvement in the detection of explosives is possible. Large-volume sampling and preconcentration is presented using a systems level approach. In addition, the engineering of large-volume sampling and preconcentration for the trace detection of explosives is explained.