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研究大量硫代硫酸根离子对摩尔法测定Cl-干扰的消除方法,建立向样品中加硝酸使硫代硫酸根离子转变成单质硫沉淀和二氧化硫气体,消除氯离子测定过程中硫代硫酸根离子干扰的方法,确定最佳操作条件.该方法精密度及准确度均较好,并已应用于硫化黑工艺废液提取硫代硫酸钠过程中Cl-的检测.
A large number of thiosulfate ions were investigated for the elimination of Cl-interference by the mol method. Nitric acid was added to the sample to convert the thiosulfate ions into elemental sulfur precipitates and sulfur dioxide gas to eliminate the thiosulfate ion during the chloride ion determination Interference method to determine the best operating conditions.The method has good precision and accuracy, and has been applied to the detection of Cl- in the process of extracting sodium thiosulfate from waste black liquor of sulfur black process.