証拠資料としての爆薬及び催涙剤検出のためのガスクロマトグラフ-パルス放電光イオン化検出器の利用(アナリティカルレポート,<特集>安心と安全に役立つ分析化学)

概要

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A gas chromatograph-pulsed discharged detector can be used in three modes, such as a pulsed discharged helium ionization detector (PDHID), a pulsed discharged photo ionization detector (PDPID) and a pulsed discharged electron capture detector (PDECD). In this report, this detector's performance was compared with other detectors, such as GC/MS, GC/AED and GC/ECD. The PDHID and/or PDECD mode of this detector was applied to the detection of explosives-covered petroleum, and tear-gas spray using 2-chloroacetophenone, respectively. For the detection of explosives, simulated experiments prepared with 1 vol%, 0.01 vol% and 0.001 vol% nitroglycerin were added to kerosene. Also, for the detection of tear gas, 100 ppt, 10 ppt and 1 ppt of 2-chloroacetophenone gas as simulated sample were used. In the nitroglycerin/kerosene sample, the detection limits by GC/AED and GC/MS were 1 vol%, but by GC/ECD and GC/PDECD, 0.001 vol% of nitroglycerin was detected without any interference by kerosene. In 2-chloroacetophenone as a tear-gas sample, 0.01 ppt of 2-chloroacetophenone could be detected by GC/ECD and GC/PDECD ; this detection limit was 10000-times lower than that of GC/MS. Furthermore, nitrogen and oxygen were also detected by PDHID. By this examination, GC/PDD was considered to be among the useful analytical devices in forensic investigations.
2007-12-05