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学科主题: 药学
题名:
ESI Fragmentation Studies of Four Tea Catechins
作者: 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
发表日期: 2009-08-10
卷: 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
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/55487
Appears in Collections:北京大学药学院_期刊论文

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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

Recommended Citation:
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.
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