GB/T 21884-2008 in English

《GB/T 21884-2008纺织印染助剂 螯合剂 螯合能力的测定》由TC134（全国染料标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
本标准规定了纺织印染助剂中螯合剂螯合能力的测定方法。本标准适用于纺织印染助剂中有机多膦酸盐、高分子聚羧酸及其盐类螯合剂螯合能力的测定；也适用于乙二胺四乙酸（EDTA）、N-羟基乙二胺四乙酸（HEDTA）、二乙基四胺五乙酸（DTPA）及其盐类的螯合剂螯合能力的测定。

Scope

This standard specifies the method for the determination of the chelating ability of chelating agents in textile printing and dyeing auxiliaries. This standard applies to the determination of the chelating ability of organic polyphosphonates, polymer polycarboxylic acids and their salts in textile printing and dyeing auxiliaries; it also applies to ethylenediaminetetraacetic acid (EDTA), N-hydroxyethylenediamine Determination of the chelating ability of tetraacetic acid (HEDTA), diethyltetraaminepentaacetic acid (DTPA) and their salts.