| 电位滴定法测定水中高锰酸盐指数 |
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| 引用本文： | 陈云南,黄菲,赵红,钱蜀,赵云芝.电位滴定法测定水中高锰酸盐指数[J].四川环境,2012(1):42-45. |
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| 作者姓名： | 陈云南 黄菲 赵红 钱蜀 赵云芝 |
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| 作者单位： | 四川省环境监测中心站,成都610041 |
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| 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。
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| 关 键 词： | 电位滴定 高锰酸盐指数 |
Determination of Permanganate Index in Water by Potentiometric Titration |
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| CHEN Yun-nan,HUANG Fei,ZHAO Hong,QIAN Shu,ZHAO Yun-zhi.Determination of Permanganate Index in Water by Potentiometric Titration[J].Sichuan Environment,2012(1):42-45. |
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| Authors: | CHEN Yun-nan HUANG Fei ZHAO Hong QIAN Shu ZHAO Yun-zhi |
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| Institution: | ( Sichuan Provincial Environmental Monitoring Center, Chengdu 610041, China) |
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| Abstract: | 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. |
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| Keywords: | Potentiometrie titration permanganate index |
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