巯基棉富集—火焰原子吸收法测定饮用水中镉铜铅的研究

The Study of Determination Cadium Copper and Lead in Drinking water by Concentration with Hydrosulfuryl Cotton and AAS

采用巯基棉富集—火焰原子吸收法测定饮用水中镉、铜和铅，就其富集酸度、洗脱液及其温度进行了探讨。此法简单，快速，线性范围镉和铜是０．００４～０．０４μｇ／ｍｌ，铅是０．１～１．０μｇ／ｍｌ；相关系数镉０．９９９１，铜０．９９９６，铅０．９９９９；回收率镉９６．９％～１０５．０％，铜９８．１％～１０１．３％，铅１００．０％～１０１．０％；变异系数镉３．５％，铜１．７６％，铅５．２５％。

We studied a new method to determine the trace cadmium,copper and lead in drinking water by concentration with hydrosulfurlyl cotton and AAS.In our experimental condition.the linear range of cadmium and copper are 0 004～0 040 μg/ml,lead is 0 1～1 0 μg/ml;the correlation coefficient of cadmium 0 9991,copper 0 9996,lead 0 9999;recorery of cadmium 96 9～105 0%,copper 98 09～101 3%,Lead 100 00～101 00%;variation coefficient of cadmium 3 5%,copper 1 76%,lead 5 25%.