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丙酮-辅助光电离离子迁移谱检测TATP炸药的研究

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

    摘要
  • 摘要: 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 25 mg/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5~100 ng，检测限可达1.2 ng。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)2CO2H+，产物离子为TATP 的碎片离子m/z 91(CH3)2C(O)OOH+。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。

     

    Abstract: 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)OOH+ with time-of-fight mass spectrometry (TOF MS). The experimental results indicate AAPI-IMS can be used to detect trace TATP with high sensitivity.

     

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