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Determination of phenolic hydroxyl groups in residual lignin using a modified UV-method
被引：93
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
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.
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页码：163 / 170
页数：8
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