Py-GC-MS and FTIR analyses of lignins from non-woody plants used for manufacturing high-quality paper pulps
A series of lignins isolated from non-woody plants after alkaline treatment have been characterized upon Py-GC/MS and FTIR. Pyrolysis compounds originated from the three different lignin units, p-hydroxyphenyl (H), guaiacyl (G) and syringyl (S), were identified and their relative peak areas were quantified. The S/G ratios obtained were compared with those calculated from intensities of 1327 and 1271 cm-1 FT-IR bands after resolution enhancement. The results indicated that flax and wheat alkaline lignins have a predominance of G units whereas sisal, abaca and jute alkaline lignins have a predominance of S units.
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| Main Authors: | , , , |
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| Format: | comunicación de congreso biblioteca |
| Language: | English |
| Published: |
2002-08-26
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| Subjects: | Lignin, Nonwoody fibers, Alkaline pulps, Py-GC/MS, FT-IR, |
| Online Access: | http://hdl.handle.net/10261/86435 |
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| Summary: | A series of lignins isolated from non-woody plants after alkaline treatment have been characterized upon Py-GC/MS and FTIR. Pyrolysis compounds originated from the three different lignin units, p-hydroxyphenyl (H), guaiacyl (G) and syringyl (S), were identified and their relative peak areas were quantified. The S/G ratios obtained were compared with those calculated from intensities of 1327 and 1271 cm-1 FT-IR bands after resolution enhancement. The results indicated that flax and wheat alkaline lignins have a predominance of G units whereas sisal, abaca and jute alkaline lignins have a predominance of S units. |
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