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Chemical diversity of lignin degradation products revealed by matrix-optimized MALDI mass spectrometry

  • Yulin Qi
  • Dietrich A. VolmerEmail author
Research Paper

Abstract

Lignin is the most abundant natural resource of aromatic moieties and the second most abundant natural biopolymer. Analytical techniques that obtain as much information as possible on the exact structural content of lignin species are essential for developing efficient processes that transform highly complex lignin wastes into value chemicals and biofuels. For mass spectrometric analysis of lignin samples, usually electrospray ionization, atmospheric pressure chemical ionization, or atmospheric pressure photoionization are used as ionization techniques. Matrix-assisted laser desorption/ionization (MALDI) is less frequently applied but offers a much more rapid screening option for lignin mixtures. In this study, we compared several common MALDI matrices for analysis of alkali lignin and discovered that different chemical matrices exhibited very different ionization efficiencies and selectivity with respect to the structures of the lignin-related compounds as well as the presence of heteroatoms. Importantly, the results highlight that the choice of matrix strongly determines the analytical coverage of molecular species in the complex lignin degradation mixtures.

Graphical abstract

Keywords

Lignin degradation products Mass spectrometry MALDI Chemical matrices 

Notes

Author contributions

The manuscript was written through contributions of all authors.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.

Supplementary material

216_2019_1984_MOESM1_ESM.pdf (630 kb)
ESM 1 (PDF 630 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Institute of Surface-Earth System ScienceTianjin UniversityTianjinChina
  2. 2.Department of ChemistryHumboldt-Universität zu BerlinBerlinGermany

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