Abstract
The quantitative analysis of phenolic OH groups is of interest for the characterization of isolated lignins when evaluating the extent to which lignin has been changed. While aminolysis is a very accurate if elaborate chemical method, the evaluation of the aliphatic and aromatic IR ester bands of acetylated lignins at 1745 and 1765 cm-1 permits a quick, easy and reliable determination of the phenolic hydroxyl groups. The excellent correlation between the two methods was proved for 35 different lignins and lignin fractions of different molecular weights.
| Translated title of the contribution | Determination of phenolic hydroxyl groups in lignins and lignin fractions by means of aminolysis and FTIR spectroscopy |
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| Original language | German |
| Pages (from-to) | 417-420 |
| Number of pages | 4 |
| Journal | European Journal of Wood and Wood Products |
| Volume | 50 |
| Issue number | 11 |
| DOIs | |
| State | Published - Nov 1992 |