特丁基对苯二酚的电子轰击质谱研究  

Electron Ionization Mass Spectrum Research on Tert-Butylhydroquinone

作　　者：杨小兵 丁松涛[1] 王安邦[1] 

机构地区：[1]防化研究院,北京100191

出　　处：《质谱学报》2011年第5期278-282,共5页Journal of Chinese Mass Spectrometry Society

基　　金：国家自然基金项目(No.21002123)资助

摘　　要：本工作研究了食品添加剂特丁基对苯二酚(TBHQ)的电子轰击质谱,结合其结构特征总结出一些裂解规律,并推导了在EI-MS中碎片离子的裂解机理。结果表明,特丁基对苯二酚的电子轰击质谱图中的主要特征离子有3个:分子离子峰m/z166、丢失一个甲基的碎片离子峰m/z 151和丢失一个甲基和中性碎片CO的碎片离子峰m/z123。另外,结合相关质谱图,探讨了主要碎片离子的裂解机理。Tert-butylhydroquinone（TBHQ） as a food additive was researched by electron impact mass spectrometry （EI-MS）. Based on the analysis of fragments appeared in the mass spectrum, as well as the structure characterizations of these compounds, some frag- mentation rules were obtained. Results show that the El-MS of TBHQ produces three com- pound-specific fragment ions： the m/z 166 molecular ion, the m/z 151 fragment ion which resulted from a methyl group loss of the molecular ion, and the rn/z 123 fragment ion which resulted from a methyl group and the CO loss from rn/z 166. At the same time, based on the related mass spectrum, the fragmentation mechanism of TBHQ was discussed.

关 键 词：食品添加剂 特丁基对苯二酚(TBHQ) 电子轰击质谱 裂解规律 裂解机理 

分 类 号：O657.63[理学—分析化学]