The mass spectral studies of these silyl derivatives of pHpNMs were performed using GC/MS/MS in both electron ionization (EI) and chemical ionization (CI) mode. RESULTS Various approaches have been proposed to assess the fragmentation pathways of the trimethylsilyl (TMS) and tert-butyldimethylsilyl (TBDMS) derivatives of pHpNMs. All the proposed fragmentation pathways were based on the product and/or
理由芥菜(NMs)是化学战剂的发泡剂。从《化学武器公约》的角度来看,氮芥子(PHpNMs)的部分水解产物被视为氮芥子暴露的重要标志。从生物或环境样品中检测pHpNMs对于获得暴露于NMs的法医证据非常有用。方法气相色谱与串联质谱联用(GC / MS / MS)是广泛用于鉴定和灵敏检测复杂基质中NMs代谢物的工具。pHpNMs使用甲硅烷基化试剂衍生化,因为它们具有高极性且不适合GC。使用GC / MS / MS在电子电离(EI)和化学电离(CI)模式下对pHpNMs的这些甲硅烷基衍生物进行了质谱研究。结果已提出了各种方法来评估pHpNMs的三甲基甲硅烷基(TMS)和叔丁基二甲基甲硅烷基(TBDMS)衍生物的裂解途径。所有建议的裂解途径均基于EI和CI模式下相应离子的产物和/或前体离子扫描。对于EI,大多数断裂途径涉及α裂解或诱导裂解。结论这是有关pHpNMs的甲硅烷基衍生物的质谱研究的第一份
Mass spectral fragmentation of perfluoroacyl derivatives of half nitrogen mustards for their detection by gas chromatography/mass spectrometry
was generated by performing gaschromatography/electron ionization massspectrometry (GC/EI-MS) and gaschromatography/positive chemical ionization massspectrometry (GC/PCI-MS). The fragmentation pathways were studied by tandem massspectrometry (MS/MS) in both EI and PCI mode. RESULTS The EI-MS spectra of the TFA and HFB derivatives of halfNMs contain intense molecular ions and fragment ions, thus