HJ 551-2016 in English

本标准规定了测定纺织染整工业废水中二氧化氯和亚氯酸盐的连续滴定碘量法。
本标准适用于使用亚漂工艺的纺织染整工业排放废水中二氧化氯和亚氯酸盐的测定。
当取样量为150 ml 时，二氧化氯的方法检出限为0.09 mg/L，测定下限为0.36 mg/L；亚氯酸盐（以亚氯酸根计）的方法检出限为0.08 mg/L，测定下限为0.32 mg/L。

Scope

This standard specifies the continuous titration iodine method for the determination of chlorine dioxide and chlorite in wastewater from textile dyeing and finishing industries. This standard is applicable to the determination of chlorine dioxide and chlorite in wastewater discharged from textile dyeing and finishing industries using the chlorine dioxide bleaching process. When the sampling volume is 150 ml, the method detection limit of chlorine dioxide is 0.09 mg/L and the lower limit of determination is 0.36 mg/L; the method detection limit of chlorite (calculated as chlorite ion) is 0.08 mg/L and the lower limit of determination is 0.32 mg/L.