食品科学 ›› 2009, Vol. 30 ›› Issue (12): 147-149.doi: 10.7506/spkx1002-6630-200912029

• 分析检测 • 上一篇    下一篇

负离子模式下纤维低聚糖的ESI-MS分析

彭 红1,2,3,林 鹿2,刘玉环1,3,阮榕生1,3,刘成梅1,3   

  1. 1.南昌大学 食品科学与技术国家重点实验室 2.华南理工大学 制浆造纸工程国家重点实验室 3.南昌大学 生物质转化教育部工程技术研究中心
  • 收稿日期:2008-09-18 修回日期:2008-11-18 出版日期:2009-06-15 发布日期:2010-12-29
  • 通讯作者: 彭红 E-mail:penghong@ncu.edu.cn; penghong.scut@yahoo.com.cn
  • 基金资助:

    教育部“长江学者和创新团队发展计划”项目(IRT0540-7);国家自然科学基金项目(U0733001)

Negative Ion Mode ESI-MS Analysis of Cellooligosaccharides

PENG Hong1,2,3,LIN Lu2,LIU Yu-huan1,3,RUAN Rong-sheng1,3,LIU Cheng-mei1,3   

  1. (1. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China;
    2. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China;
    3. Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China)
  • Received:2008-09-18 Revised:2008-11-18 Online:2009-06-15 Published:2010-12-29
  • Contact: PENG Hong1,2,3, E-mail:penghong@ncu.edu.cn; penghong.scut@yahoo.com.cn

摘要:

在负离子模式下对纤维三糖和纤维四糖进行电喷雾电离质谱(ESI-MS)分析。在负离子模式下,纤维三糖的加合离子是[M + 3H2O + Cl]-(m/z 593.5),二级质谱中主要有两种碎片离子m/z 503 和m/z 341;纤维四糖能形成去质子准分子离子[M - H]-(m/z 665)和氯加合离子[M + Cl]-(m/z 701.5),二级碎片中均有7 种主要的碎片离子,即m/z 665 或m/z 647、545、503、485、383、341 和m/z 323。

关键词: 纤维三糖, 纤维四糖, 负离子模式, 电喷雾电离质谱, 碎片

Abstract:

Cellotriose and cellotetraose were analyzed by electron pray ionization mass spectrometry (ESI-MS) with negative ion mode. Under the ESI negative ion mode, an adduct ion from cellotriose was [M+3H2O+Cl]- (m/z 593.5), and there were two main fragments (m/z 503 and m/z 341) in MS/MS spectrum. A proton-removing quasi-molecular ion [M-H]- (m/z 665) and an adduct ion [M+Cl]- (m/z 701.5) from cellotetrose were formed, and there were seven main fragments in MS/MS spectrum, including m/z 665 or m/z 647, m/z 545, m/z 503, m/z 485, m/z 383, m/z 341 and m/z 323.

Key words: cellotriose, cellotetrose, negative ion mode, electron pray ionization mass spectrometer, fragment

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