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ESI Fragmentation Studies of Four Tea Catechins
Liu Guo-Qiang2; Dong Jing1; Wang Hong2; Wan Le-Ren1; Hashi Yuki1; Chen Shi-Zhong2
关键词Ec/c Ecg/cg Hydrogen/deuterium(H/d) Exchange Mass Fragmentation
刊名CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
2009-08-10
30期:8页:1566-1570
收录类别SCI
文章类型Article
WOS标题词Science & Technology
类目[WOS]Chemistry, Multidisciplinary
研究领域[WOS]Chemistry
关键词[WOS]TANDEM MASS-SPECTROMETRY ; GREEN TEA ; EXCHANGE
英文摘要

The fragmentation pathways of tea catechins (two group stereoisomers) were studied via the ion-trap time-of-flight (IT-TOF) mass spectrometer with the advantages of high mass accuracy, high resolution, multistage analysis. Hydrogen/deuterium exchange method was used to elucidate the fragmentation processes. The results show that catechin stereoisomers possess the same fragmentation pathways and cannot be differentiated even in MS(n) spectra. We can locate the loss of CO(2) and C(2)H(2)O in MS(2) spectra from EC/C to A ring and B ring, respectively. The ions of (1,4)A(-), (1,3)A(-), (1,2)A(-) and [M - H - B ring](-) were characteristic productions for EC/C, and it could be used to propose the substituent group of A ring through the m/z shift of these ions. The ion at m/z 169 corresponding to the gallic acid anion was characteristic fragmentation of ECG/CG, which was great helpful for differentiating ECG/CG and EC/C.

语种中文
WOS记录号WOS:000269601000017
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被引频次:11[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bjmu.edu.cn/handle/400002259/55487
专题北京大学药学院
北京大学第三临床医学院_内分泌科
作者单位1.Shimadzu Int Trading Shanghai Co Ltd, Beijing Off, Beijing 100020, Peoples R China
2.Peking Univ, Sch Pharmaceut Sci, Beijing 100191, Peoples R China
推荐引用方式
GB/T 7714
Liu Guo-Qiang,Dong Jing,Wang Hong,et al. ESI Fragmentation Studies of Four Tea Catechins[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2009,30(8):1566-1570.
APA Liu Guo-Qiang,Dong Jing,Wang Hong,Wan Le-Ren,Hashi Yuki,&Chen Shi-Zhong.(2009).ESI Fragmentation Studies of Four Tea Catechins.CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,30(8),1566-1570.
MLA Liu Guo-Qiang,et al."ESI Fragmentation Studies of Four Tea Catechins".CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE 30.8(2009):1566-1570.
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