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Effect of alkali extraction on the lignin monomeric composition inEucalyptus


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).

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Key words

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