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摘要
A novel method has been developed for the rapid determination of the alpha-cellulose content in dissolving pulps. After alkaline treatment of the sample, the alkaline-soluble portion of the filtrate was transformed into colloids in a medium containing ethanol (80 %). The colloid solution was then measured by visible spectroscopy. The results showed a linear correlation between the root of absorbance at 500 nm and the amount of the colloid in the solution. The linear regression coefficient (R-2) was 0.986 for eucalyptus pulp and 0.997 for pine pulp. A universal calibration model has been developed using the partial least square regression technique. The model is robust, and the results have good accuracy, with R-2, root mean squared error cross validation, and relative prediction errors of 0.972, 0.492, and 0.51 %, respectively. The model also performed well when compared with the results from the traditional alpha-cellulose measurement method. In summary, the new method is simple, practical and suitable for use to determinate alpha-cellulose content in dissolving pulps in laboratory or industrial applications.
- 出版日期2015-8
- 单位制浆造纸工程国家重点实验室; 华南理工大学
