纵向塞曼恒温平台石墨炉原子吸收连续测定环境水中痕量元素镉、砷、铜、铅

Continuous determination of trace cadmium,arsenic,copper and lead in environmental water by stabilized temperature platform furnace AAS using longitudinal arrangement Zeemeneffect background correction.

为了准确测定环境水样中痕量元素Ｃｄ、Ａｓ、Ｃｕ、Ｐｂ含量。采用集恒温平台石墨炉（ＳＴＰＦ）一体的纵向塞曼效应背景校正，最大功率升温，钯作通用基体改进剂和峰面积积分的一种新方法。测定结果表明，镉、砷、铜和铅的检出限（３σ）分别为２．５×１０－１３、５．０×１０－１１、３．８×１０－１１、２．５×１０－１１ｇ；相对标准偏差（ｎ＝６）分别为３．４％～４．９％、２．５％～４．３％、１．８％～３．６％、１．８％～４．１％；回收率分别为９３．５％～１０６％、９１．５％～１０３％、９３．５％～１１０％、９１．８％～１０８％。方法准确可靠，展现了绝对分析的前景。

A new method for the precise determination of trace cadmium, arsenic, copper and lead in environmental water by using longitudinal arrangement Zeemeneffect background correction, maximum power heating, peak area integration and Pd as a matrix modified,called altogether the stabilized temperature platform furnace (STPF) AAS,has been studied. This method is rapid, accurate and precise. The detection limits(3σ) , relative standard deviation(n=6) and recovery for Cd,As,Cu and Pb were 2.5×10-13,5.0×10-11,3.8×10-11 and,2.5×10-11g;3.4%～4.9%,2.5%～4.3%,1.8%～3.6% and 1.8%～4.1%;93.5%～106%,91.5%～103%,93.5%～110% and 91.8%～108%respectively. This satisfactory method has shown an outlook for the absolute analysis.