Effect of alkali extraction on the lignin monomeric composition inEucalyptus |
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Authors: | Toshihiro Ona Tetsuya Sonoda Kazuya Ito Masaru Shibata |
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Institution: | (1) Kameyama Research Center, Forestry Research Institute, Oji Paper, 24-9 Nobono-cho, 519-0212 Kameyama, Japan |
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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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Keywords: | Eucalyptus camaldulensis E globulus Alkali extraction Lignin Lignin monomeric composition |
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