萃取光度法对工业废水中微量铅的测定

Extraction Luminosity Method to Determining of micro-lead in Industrial Waste Water

本文研究了在磷酸介质中，基于铅（Ⅱ）－碘化钾－罗丹明Ｂ形成的紫色缔合物，可被苯定量萃取，而提出一个测定工业废水中微量铅的新方法－萃取光度法。研究结果表明，在适量硫尿存在的情况下，对于废水中常见的二十几种元素离子均无干扰。本法可成功地直接用于废水样品中微量铅的测定，精密度和准确度良好。

This paper put forward a new method of Determining micro-lead in industrial waste water -extraction luminosity method,which is based on purple chemical compound formed by lead(Ⅱ),potassium iodine and luodanming B which can be extracted by benzene puantitatively. The result of study indicates that this method is undisturbed to common elementsions of twenties kinds in the waste water,under proper sulphurea condition. The method can be directly applied to determining of micro-lead in the sample of waste water.The determining accuracy and precision are very good.