电位滴定法测定碳酸钠中氯离子  

Determination of chloride ion in sodium carbonate by potentiometric titration

作　　者：赵佳琪 刘宝珠 ZHAO Jiaqi;LIU Baozhu(Laboratory,Xinjiang Markor Chemical Industry Co.,Ltd.,Korla 841000,China)

机构地区：[1]新疆美克化工有限责任公司实验室,新疆库尔勒841000

出　　处：《江西化工》2022年第2期38-40,共3页Jiangxi Chemical Industry

摘　　要：工业级碳酸钠生产来源不同,其杂质类别、含量差异较大。氯离子是碳酸钠的重要控制指标,目前常见的氯离子分析方法为汞量法和莫尔法。本文根据莫尔法的原理改用电位滴定法进行氯离子的测定。并通过实验验证使用自动电位滴定仪测定氯离子时如何消除黑色沉淀干扰的方法及效果。Industrial grade sodium carbonate is produced from different sources,and its impurity categories and contents vary greatly.Chloride ion is an important control index of sodium carbonate.At present,the common chloride ion analysis methods are mercury method and Mohr method.Based on the principle of Mohr method,potentiometric titration is used to determine chloride ion.The method and effect of how to eliminate the interference of black precipitation when using automatic potentiometric titrator to determine chloride ion are verified by experiments.

关 键 词：电位滴定 工业碳酸钠 沉淀滴定法 

分 类 号：O657.1[理学—分析化学] TQ131.12[理学—化学]