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本文对N-苯乙烯基糖精在70eV电子束轰击下质谱的裂解规律进行了研究.这类化合物都有较强的分子离子峰,大部分是基峰.[M-HSO_2]~+是它们的特征碎片.实验证明,糖精母体的SO_2有可能和苯环邻位H或取代基苯环上的H结合而消去HSO_2.当苯乙烯基邻位取代基为NO_2时,由于硝基氧的迁移,使质谱上的m/z119成为基峰.
In this paper, the cleavage regularity of N-styryl saccharin under 70eV electron beam bombardment has been studied. These compounds have strong molecular ion peaks, mostly base peaks. [M-HSO_2] ~ + is their Characteristic fragments.Experiments have shown that the precursor SO2 of saccharin may be combined with the H of the benzene ring or the H of the benzene ring to eliminate HSO_2.When the ortho substituent of the styryl group is NO_2, due to the migration of nitroxide, Make the mass spectrum m / z 119 as the base peak.