Previous investigations have evaluated the efficacy of anions such as NO3-, Cl-, Br-, CH3COO-, and CF3COO- as additives to generate or enhance mass spectrometric signals from explosives under plasma ionization conditions. The results of this study demonstrate that for detecting nitramine-class explosives, such as 1,3,5-trinitroperhydro-1,3,5-triazine (RDX) and 1,3,5,7-tetranitro-1,3,5,7-tetrazacyclooctane (HMX), 1,4-benzoquinone (BQ) is a highly effective and efficient dopant. When used in conjunction with ambient-pressure negative-ion helium-plasma ionization (HePI), 1,4-benzoquinone readily captures an electron, forming an abundant molecular anion (m/z 108), which upon exposure to vapors of RDX and HMX generates adduct ions of m/z 330 and 404, respectively. The signal level recorded for RDX upon adduction to the radical anion of 1,4-benzoquinone under our experimental conditions was significantly higher than that realized by chloride adduction using dichloromethane (DCM) as the dopant.

中文翻译：

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1,4-苯醌作为一种高效掺杂剂，用于在配备氦等离子体电离 (HePI) 源的单四极杆质谱仪上增强电离和检测硝胺爆炸物。

先前的研究已经评估了诸如 NO3-、Cl-、Br-、CH3COO- 和 CF3COO- 等阴离子作为添加剂在等离子体电离条件下产生或增强来自爆炸物的质谱信号的功效。本研究结果表明，用于检测硝胺类爆炸物，如 1,3,5-trinitroperhydro-1,3,5-triazine (RDX) 和 1,3,5,7-tetranitro-1,3,5 ,7-四氮杂环辛烷 (HMX), 1,4-苯醌 (BQ) 是一种高效且高效的掺杂剂。当与环境压力负离子氦等离子体电离 (HePI) 结合使用时，1,4-苯醌很容易捕获一个电子，形成丰富的分子阴离子 (m/z 108)，当暴露于 RDX 和 HMX 蒸气时分别生成 m/z 330 和 404 的加合离子。与 1 的自由基阴离子加成后记录的 RDX 信号水平，