有机化合物表面电离质谱技术

Surface Ionization Mass Spectrometric Technique Of Organic CompOUllds

文章简述有机化合物表面电离质谱技术的发展和特性,介绍了三种电离类型:分子表面电离(MSI)、分解表面电离(DSI)和缔合表面电离(ASI),以及相对灵敏度与电子轰击电离灵敏度比较,离子流强度与样品分压、样品吸附时间、热发射表面温度的关系。讨论了含氮直链和环状有机化合物、碳氢化合物、含氧有机化合物和金属有机化合物表面电离质谱,列出了其中45种有机化合物的分子组成、电离能或出现电离能、强峰离子、相对灵敏度。

The developments and performations of surface ionization mass spectrometry of organic compounds are described in this paper. The three modes of ion formation.molecular surface ionization(MSI), dissociative surface ionizat/on(DSI) and associat/ve surface ionization (ASI), the relative sensitivity, the sensitivity comparison of SI and EI, the currents versus sample partial pressure and adsorption time, and the filament temperature are described in detail The surface ionization mass spectrometric analysis of nitrogen-containing aliphatic and cyclic organic compounds) carbohydrate, oxygenic organic compounds, and metalline organic compounds are reviewed. The numbering) molecular weight, (appearance) ionization energy, relative sensitivity) and sensitivity ratio in SI mode to that in EI mode and so on were prcseted in the Table 2.