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基质辅助激光解吸附飞行时间质谱方法分析山竹果皮缩合单宁 被引量:6

Analysis of Condensed Tannins from Mangosteen Pericarps by Matrix-assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry
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摘要 在反射模式(Reflectron modes)下,去离子处理后,引入Cs+(CsCl,1.52g/L)作为阳离子化试剂,得到清晰的山竹果皮缩合单宁的MALDI-TOF质谱图。解析该质谱图能得到完整的山竹果皮缩合单宁的结构信息:山竹果皮缩合单宁是从三聚体(m/z999)到十一聚体(m/z3303)分布的多聚物,离子峰最强的为五聚体(m/z1575);同时存在3种结构单元:(表)儿茶素(C/EC)、(表)棓儿茶素(GC/EGC)和(表)阿福豆素(AC/EAC),且C/EC、AC/EAC和GC/EGC的离子峰强度依次降低,同时在四聚体(m/z1440)到七聚体(m/z2303)均存在棓酰基;从四聚体(m/z1285)到八聚体(m/z2436),不同的聚合物中普遍存在A型连接。本研究优化了获取植物缩合单宁结构信息的基质辅助激光解吸附飞行时间质谱方法。 In the process of deionization and selection Cs + (CsCl,1.52 g/L) as cationization reagent,the reflectron modes MALDI-TOF spectrum of condensed tannins from mangosteen (Garcinia mangostana L.) pericarps showed an intact structure characteristics.The polymers of mangosteen condensed tannins extend from the trimer (m/z 999 ) to the undecamer (m/z 3303 ) ,with the highest intensity in pentamer (m/z 1575) .(epi) Catechin (C/EC) ,(epi) gallocatechin (GC/EGC) and (epi) afzelechin (AC/EAC) were all detected in polymers with an intensity of C/EC AC/EAC GC/EGC.Meanwhile,galloyl units occurred from tetramer (m/z 1440) to heptamer (m/z 2303) .The presence of A-type interflavan ether linkage ranged from tetramer (m/z 1285) to octamer (m/z 2436) .
出处 《分析化学》 SCIE EI CAS CSCD 北大核心 2010年第10期1492-1496,共5页 Chinese Journal of Analytical Chemistry
基金 教育部新世纪优秀人才支持计划(No.NCET-07-0725) 留学回国人员基金资助项目
关键词 山竹果皮 缩合单宁 基质辅助激光解吸附飞行时间质谱 阳离子化试剂 多聚物 Mangosteen pericarps Condensed tannins Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry Cationization reagents Polymers
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参考文献13

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共引文献12

同被引文献152

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