GB/T 5401-2004 in English

《GB/T 5401-2004纸浆 碱溶解度的测定》由TC141（全国造纸工业标准化技术委员会）归口，主管部门为中国轻工业联合会。
本标准规定了用容量法测定纸浆的碱可溶成分，适应于各种漂白浆。本标准规定了一种采用各种固定浓度的、冷的氢氧化钠溶液测定纸浆碱溶解度的方法，该氢氧化钠浓度常为18%和10%（质量分数）。本标准主要用于漂白浆的研究，如对制造漂白浆的各阶段的研究。但本标准也适用于未漂浆的研究。

Scope

This standard specifies the volumetric method for determining the alkali-soluble content of pulp, and is applicable to various bleached pulps. This standard specifies a method for determining the alkali solubility of pulp using cold sodium hydroxide solutions of various fixed concentrations, the concentration of which is usually 18% and 10% (mass fraction). This standard is mainly used in the research of bleached pulp, such as the research on the various stages of manufacturing bleached pulp. But this standard also applies to the research of unbleached pulp.