摘要
利用氯离子选择性电极法测定循环水中氯离子含量。该方法以氯离子选择性电极为指示电极,应用校准曲线直接测定循环水中氯离子浓度。实验考察了SO42-、HCO-3、PBTCA、HEDP、DCCNa等循环水中干扰因素及pH、温度等测定条件对测定的影响。该方法测量精度的相对标准偏差RSD为1.8%(n=8);加标回收率在95.0%—104%之间,平均回收率为99.1%,加标回收率相对标准偏差RSD为4.0%(n=5)。
A method for determination of chloride in industrial circulating water by chloride selective electrode was established.The chloride selective electrode was used as indicator electrode.Method of calibration curve was applied to determining concentration of chloride.The effects of SO2-4,HCO-3,PBTCA,HEDP,DCCNa,pH and temperature on the determination were discussed.The relative standard deviation（RSD） of this method is 1.8%（n=8）,recovery is 95.0%—104.1%,the average recovery is 99.1%,RSD of recovery is 4.0%.
出处
《光谱实验室》
CAS
CSCD
2012年第3期1659-1662,共4页
Chinese Journal of Spectroscopy Laboratory
关键词
氯离子
选择性电极
循环水
电位法
Chloride Ion
Selective Electrode
Circulating Water
Potentiometry
