Effect of cationization reagents on the matrix-assisted laser desorption/ionization time-of-flight mass spectrum of chinese gallotannins

Ping Xiang, Yiming Lin, Peng Lin, Cheng Xiang, Zhiwei Yang, Zhongmin Lu

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

In this study, Chinese gallotannins were characterized by MALDI-TOF MS, and effects of cationization reagents on the quality of spectra were investigated. The trideca- and tetradeca-galloyl glucoses were observed in Chinese gallotannins, which could not be detected in earlier studies. When Cs + was used as the cationization reagent, Chinese gallotannins gave a relatively simple MALDI-TOF spectrum, three series of quasimolecular ions [M + Cs]+, [M + 2Cs-H]+, and [M + 3Cs-2H]+ and a series of metastable ion peaks with minimum abundance were detected. Selection of Na+ as the cationization reagent, additional three series of ion peaks including two patterns from the fragmentation and complex 2M adducts [2M + Na]+ can be distinguished. In the case of no deionization or addition of cationization reagent to the analyte/ matrix, naturally abundant Na+ and K+ as the cationization reagent, [M + Na] + and [M + K]+ molecular ions both appeared in the complicated spectrum. Therefore, we conclude that cationization reagents affect the MALDI-TOF MS spectrum of Chinese gallotannins significantly.

Original languageEnglish (US)
Pages (from-to)859-864
Number of pages6
JournalJournal of Applied Polymer Science
Volume105
Issue number2
DOIs
StatePublished - Jul 15 2007

Keywords

  • Cationization reagents
  • Chinese gallotannins
  • Hydrolyzable tannins
  • MALDI-TOF MS

ASJC Scopus subject areas

  • Polymers and Plastics

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