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Effect of alkali extraction on the lignin monomeric composition inEucalyptus

Abstract

The effect of alkali extraction on the lignin monomeric composition was examined inEucalyptus camaldulensis andE. globulus by thioacidolysis using extractive-free samples as a control. Results showed that the effect onEucalyptus is different among species and among sample positions in the trunk, although a small amount of lignin is solubilized during the extraction in all samples. In addition, it was proved that lignin extracted by the alkali extraction is not always guaiacyl-rich, probably relating to the original lignin monomeric composition, which depends on the sample species or the sample position in the trunk.

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Correspondence to Toshihiro Ona.

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Ona, T., Sonoda, T., Ito, K. et al. Effect of alkali extraction on the lignin monomeric composition inEucalyptus . J Wood Sci 46, 410–413 (2000). https://doi.org/10.1007/BF00776406

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Key words

  • Eucalyptus camaldulensis
  • E. globulus
  • Alkali extraction
  • Lignin
  • Lignin monomeric composition