ISO 302:2015 纸浆 卡伯（Kappa）值的测定

标准编号：ISO 302:2015

中文名称：纸浆 卡伯（Kappa）值的测定

英文名称：Pulps — Determination of Kappa number

发布日期：2015-08

标准范围

This International Standard specifies a method for the determination of the Kappa number of pulp. TheKappa number is an indication of the lignin content or bleachability of pulp.This International Standard is applicable to all kinds of chemical pulps and semi-chemical pulps withinthe Kappa number range 1 to 100. For pulps with a Kappa number exceeding 100, use the chlorineconsumptionprocedure (ISO 3260) to describe the degree of delignification.To achieve the greatest precision and accuracy, the sample size has to be adjusted so that theconsumption of permanganate falls between 20 % and 60 % of the amount added.NOTE There is no general and unambiguous relationship between the Kappa number and the lignin contentof pulp. The relationship varies according to the wood species and delignification procedure. All compoundsoxidized by KMnO4, not only lignin, will increase the consumption of KMnO4, and thereby increase the Kappanumber.[8] If the Kappa number is to be used to derive an index of pulp lignin content, specific relationships willhave to be developed for each pulp type.

标准预览图