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

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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

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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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