串联组合离子选择电极的研究——利用Ag_2S电极测定废水中S^(2-)离子含量

Investigation of Ion Selective-Electrodes by Series Combination--Determination of Sulfide Ion in Wagtewater with Silver Suifide Electrode.

本文依据电池串联原理将多组电极串联组合,减少了因电动势测量误差而造成的测定浓度的相对误差,明显地提高了测定的精密度和准确度.对工业废水中S^(2-)离子含量的测定结果令人满意.其相对偏差低于2.5％,方法回收率为97.5—101.7％,明显优于现有离子选择电极测定方法.与比色法进行比较,测得结果基本一致.

A group of silver sulfide electrode combined in series was applied to determine sulfide ion in wastewater. The experimental results show that the series combination of the electrodes greatly improved the accuracy and precision. The relative deviation is smaller than 2.5% and the recoveries arc in the range of 97.5-101.7%.