A comparative study of the electrospray ionization response of β-O-4′ lignin model compounds

Shardrack O. Asare, Bert C. Lynn

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Electrospray ionization mass spectrometry has recently become the technique of choice for rapid characterization of lignin degradation products. However, the fundamental question of the relationship between lignin structure and ionization efficiency has not been explored. In this work, we studied the electrospray ionization response of five structurally similar β-O-4′ model lignin compounds using lithium cationization in the positive electrospray ionization mode. The studied compounds have the same β-O-4′ backbone structure but differ at the α-position by increasing nonpolar side chains. Our results show a correlation between the ionization response and the length of the nonpolar side chain, with analytes having the longest side chain recording the highest ESI response in the full scan mode. Factors affecting the formation of analyte ions and analyte cluster ions were also studied. We have shown for the first time in this work that the introduction of a nonpolar group onto a β-O-4′ lignin compound can increase the lithium cationization ESI response in the positive ion mode.

Original languageEnglish
Pages (from-to)540-548
Number of pages9
JournalJournal of Mass Spectrometry
Volume54
Issue number6
DOIs
StatePublished - Jun 2019

Bibliographical note

Funding Information:
Authors S.A. and B.C.L. acknowledge the National Science Foundation

Publisher Copyright:
© 2019 John Wiley & Sons, Ltd.

Keywords

  • clusters
  • electrospray
  • lithium adduct
  • response
  • β-O-4′ lignin model

ASJC Scopus subject areas

  • Spectroscopy

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