摘要：

采用莫尔法与自动电位滴定法测定自来水中氯离子含量,并进行精密度和加标回收率实验。结果表明,莫尔法和电位滴定法均能满足自来水中氯离子含量的分析要求,其中自动电位滴定法的标准偏差S为0.099mg/L、相对标准偏差RSD为0.46%,加标回收率均在90%~110%之间,明显好于莫尔法。

关键词: 莫尔法, 自动电位滴定法, 精密度, 加标回收率

Abstract:

Precision and recovery experiments have been done by Mohr method and potentiometry to determine the chloride ion content in tap water. The results indicate that both of the methods could satisfy the analytic demand. The standard deviation of automatic potentiometry is 0.099 mg/L， the relative standard deviation is 0.46%， and the indexed recovery rates are 90%-110%， which are obviously better than that gained by Mohr method.

Key words: Mohr method, automatic potentiometry, precision, indexed recovery rate

中图分类号: 

• R123.1