两种测定肥料中氯离子方法的比较

摘要

用全自动电位滴定法与佛尔哈德法对复混肥料、掺混肥料、有机-无机复混肥料、水溶肥料、氯化钾等样品中氯离子含量进行测定比较.比较结果显示,全自动电位滴定法测定氯离子比佛尔哈德法所需要配制的化学试剂数量和种类少,且不受溶液颜色干扰,检测范围广,比佛尔哈德法更加快速、准确、简便.在大批量样品测试中,全自动电位滴定法更具有方便、快捷的优势.%By automatic potentiometric titration and Volhard method of compound fertilizer,bulk blending fertilizer, organic-inorganic compound fertilizer, water-soluble fertilizer, potassium chloride, chloride content in samples were measured and compared. The comparisons showed that the automatic potentiometric titration method for the determination of chloride content was more rapid, accurate and simple than Volhard method, and it was less quantity and kinds of chemical reagents than Volhard method, and it had no interference of color of solution, and it had a wide range of detection. Automatic potentiometric titration is more convenient and quick in mass sample testing.