丙酮-辅助光电离离子迁移谱检测TATP炸药的研究

三过氧化三丙酮(TATP)是一种新型过氧化物炸药,由于制备原料易得、制备方法简单,常被恐怖分子用于恐怖袭击等犯罪活动中。本工作以25mg/L丙酮作为掺杂剂,发展了一种基于丙酮-辅助光电离离子迁移谱检测TATP的方法。对电场强度和进样口温度等参数进行优化后,TATP的线性范围为5~100ng,检测限可达1.2ng。利用飞行时间质谱对反应试剂离子和产物离子进行分析,确定反应试剂离子主要是丙酮二聚体离子(CH3)2CO]2H+,产物离子为TATP的碎片离子m/z91(CH3)2C(O)OO]H+。实验结果表明,这种新型非放射性电离源离子迁移谱能够实现痕量TATP过氧化物爆炸物的高灵敏检测。

Sensitive Detection of Triacetone Triperoxide (TATP) by Acetone-Assisted Photoionization Ion Mobility Spectrometry

Triacetone triperoxide (TATP) is a kind of peroxide-based explosive. Because of the preparation of easily obtained raw materials, simple preparation method, TATP was used by terrorists for terrorist attacks and criminal activites. In this study, an acetone-assisted photoionization ion mobility spectrometry (AAPI-IMS)was developed for sensitive detection of TATP with 25 mg/L acetone as the dopant. The parameters of AAPI IMS were optimized with respect to electric field intensity and temperature of inlet. Under the optimal conditions, the linear range of 5-100 ng and the limit of detection of 1.2 ng were achieved for TATP. The reactant ions and product ions were identified to be (CH₃COCH₃)₂H⁺ and fragment ions of TATP m/z 91 (CH₃)₂C(O)OO]H⁺ with time-of-fight mass spectrometry (TOF MS). The experimental results indicate AAPI-IMS can be used to detect trace TATP with high sensitivity.