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学科主题: 分析化学
题名: Selective determination of pyridine akaloids in tobacco by PFTBA ions/analyte molecule reaction ionization ion trap mass spectrometry
其他题名: 应用离子肼质谱通过与PFTBA进行分子离子反应选择性研究烟草中的嘧啶生物碱类物质
作者: Zhang JX(张建勋) ; Ji HW(姬厚伟) ; Sun SH(孙世豪) ; Mao DB(毛铎斌) ; Liu HW(刘胡伟) ; Guo YL(郭寅龙)
通讯作者: 郭寅龙
刊名: J. Am. Soc. Mass Spectrom.
发表日期: 2007
卷: 18, 期:10, 页:1774-1782
收录类别: SCI
部门归属: 上海有机所上海质谱中心; 郑州烟草研究所; 北京大学
英文摘要: The application of perfluorotributylamine (PFTBA) ions/analyte molecule reaction ionization for the selective determination of tobacco pyridine alkaloids by ion trap mass spectrometry (IT-MS) is reported. The main three PFTBA ions (CF3+, C3F5+, and C5F10N are generated in the external source and then introduced into ion trap for reaction with analytes. Because the existence of the tertiary nitrogen atom in the pyridine makes it possible for PFTBA ions to react smoothly with pyridine and forms adduct ions, pyridine alkaloids in tobacco were selectively ionized and formed quasi-molecular ion [M + H](+) and adduct ions, including [M + 69](+), [M + 131](+), and [M + 264](+), in IT-MS. These ions had distinct abundances and were regarded as the diagnostic ions of each tobacco pyridine alkaloid for quantitative analysis in selected-ion monitoring mode. Results show that the limit of detection is 0.2 mu g/mL, and the relative standard deviations for the seven alkaloids are in the range of 0.71% to 6.8%, and good recovery of 95.6% and 97.2%. The proposed method provides substantially greater selectivity and sensitivity compared with the conventional approach and offers an alternative approach for analysis of tobacco alkaloids.
语种: 英语
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WOS记录号: WOS:000250098100005
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/19946
Appears in Collections:分析化学研究室_期刊论文

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Recommended Citation:
Zhang JX,Ji HW,Sun SH,et al. Selective determination of pyridine akaloids in tobacco by PFTBA ions/analyte molecule reaction ionization ion trap mass spectrometry[J]. J. Am. Soc. Mass Spectrom.,2007,18(10):1774-1782.
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