Determination of phenolic hydroxyl groups in residual lignin using a modified UV-method

被引：98

作者：

Gärtner, A

Gellerstedt, G

Tamminen, T

机构：

[1] Royal Inst Technol, Div Wood Chem, SE-10044 Stockholm, Sweden

[2] Bim Kemi AB, SE-44303 Stenkulien, Sweden

[3] Finnish Pulp & Paper Res Inst, Paper Sci Ctr, FIN-02151 Espoo, Finland

来源：

NORDIC PULP & PAPER RESEARCH JOURNAL | 1999年 / 14卷 / 02期

关键词：

analytical method; bleaching; hydrogen peroxide; kraft pulping; lignin; oxygen; phenols; UV-spectroscopy;

D O I：

10.3183/npprj-1999-14-02-p163-170

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

A new modification of the UV ionization difference method has been used to determine the amount of free phenolic hydroxyl groups in isolated residual lignins from kraft pulps. The method offers a simple and rapid way to determine both the type and amount of phenolic hydroxyl groups in lignin. The lignin samples were also subjected to aminolysis, a reliable but time-consuming method for the determination of free phenolic hydroxyl groups. The results obtained with aminolysis were about 15-20% higher than the results obtained with the UV-method, but the correlation between the results obtained with the two methods was good.

引用

页码：163 / 170

页数：8