络合滴定法测定废水中铅离子的浓度

Determination of the concentration of lead ions in wastewater by chelatometric titration

介绍了一种测定铅离子浓度的新方法 ,克服了常用方法 (双硫腙比色法、原子吸收分光光度法 )要使用剧毒物质KCN、绘制标准曲线、操作过程复杂及仅适合低浓度测定等局限性。该方法测定过程简单 ,测定结果准确(相对误差为 0 .0 18% ,相对标准偏差为 0 .4 1% ) 。

A new method of determining the concentration of lead ions. This methods makes up the limitation which the common ways (e.g.dithizone colorimetry and atomic absorption spectrophotometry) have if virudent poison KCN is used, the standard curve is protracted, the operation process is too complicated, and is only suitable for the determination of matter with low concentration. The operation process of the new method is simple and the determination result is accurate (the relative error is 0.01% and the relative standard deflectivity is 0.41%). It is suitable for the determination of lead with high concentration.