电位滴定法测定水中高锰酸盐指数  

Determination of Permanganate Index in Water by Potentiometric Titration

作　　者：陈云南[1] 黄菲[1] 赵红[1] 钱蜀 赵云芝[1] 

机构地区：[1]四川省环境监测中心站,成都610041

出　　处：《四川环境》2012年第1期42-45,共4页Sichuan Environment

摘　　要：提出实验室用电位滴定测定水中高锰酸盐指数的方法。在国标法的基础上研究及优化了标定方法和实验方法,用电位滴定仪测定水中高锰酸盐指数,方法的检出限约为0.15mg/L,测定下限为0.60mg/L。实验证明,标准样品测量值均在推荐值范围内,对0.6mg/L,5.0mg/L,8.0mg/L浓度的NaC2O4标准溶液进行5次测定,得到的相对标准偏差分别为1.59%,0.97%,0.73%。在做低浓度的水样时,高锰酸钾溶液的浓度可以选择0.005mol/L。The potentiometric titration method for laboratory determination of permanganate index in water was developed. Based on the GB/T11892-89, the methods of calibration and experiment process were studied and optimized. The detection limit and lower limit of the potentiometric titration method were 0. 15 and 0. 60mg/L respectively. The experimental results showed that all the values of standard samples were within the permission range. The NaC2 04 standard solutions with concentrations of 0. 6, 5. 0 and 8. 0mg/L were determined for five times, obtaining relative standard deviations of 1.59%, 0. 97% and 0. 73% respectively. For water samples with low concentration, 0. 005mol/L potassium permanganate solution was suggested to prepare.

关 键 词：电位滴定 高锰酸盐指数 

分 类 号：X832[环境科学与工程—环境工程]