差分离子迁移谱和迁移时间离子迁移谱联用技术检测化学战剂模拟物

摘要

Using a novel hybrid technology combined differential ion mobility spectrometry ( DMS) with drift time ion mobility spectrometry DMS-IMS2 , we detected the typical chemical warfare agent simulants dimethyl methylphosphonate ( DMMP ) and methyl salicylate ( MS) . With carrier gas 800 mL/min and DMS RF voltage 1100 V, the chemical warfare agents DMMP and MS could be detected and characterized by DMS-IMS2 under DIMS mode. In addition, DMS-IMS2 is capable to monitor positive and negative ions of DMMP and MS simultaneously, and provides the two-dimensional separation parameters DMS compensation voltage ( CV) and IMS drift time ( Td ) , which provides more information for the identification of two chemical warfare agents. DMS-IMS2 has potential application in on-site detection and instrument miniaturization due to its advantages including small size, low power consumption and rapid response time.%采用平板式差分离子迁移谱( DMS)和迁移时间离子迁移谱( DTIMS)联用技术( DMS-IMS2)对典型化学战剂模拟物甲基膦酸二甲酯(DMMP)和水杨酸甲酯(MS)进行测定。实验结果表明,在载气800 mL/min, DMS射频电压1100 V条件下,DMS-IMS2在DIMS模式能够实现DMMP和MS两种化学战剂模拟物的有效识别和检测。另外,DMS-IMS2能够实现DMMP和MS正、负离子的同时检测,同时获得DMMP和MS的DMS补偿电压( CV)和IMS迁移时间( Td )的二维分离信息,为两种化学战剂模拟物的准确鉴定提供更多的信息。DMS-IMS2具有二维分析能力、可同时分析正负离子、响应速度快、体积小、功耗低等优点,在现场检测中具有广阔的应用前景。