电位溶出法同时测定水质和生物样品中的铜、铅、镉、锌、铁、锰

Potentiometric Stripping Analysis for Simultaneous Determination of Copper, Lead, Cadmium, Zinc, Iron and Manganese

本文提出了在乙二胺和乙二胺-盐酸体系中以计时电位溶出法测定Fe、Mn及以电位溶出法测定Cu、Pb、Cd、Zn的新方法。各元素的浓度在Fe 0.1～2600 ng/ml、Mn0.05～3200 ng/ml、Cu0.2～2800 ng/ml、Pb0.1～3600ng/ml、Cd 0.05～1200 ng/ml、Zn0.2～4200ng/ml时,浓度与溶出峰高呈良好的线性关系。本方法应用于水质及生物样品中上述各元素的测定,结果良好。

A new method of potentiometric stripping analysis and chronopotentiometric stripping analysis for the simultaneous determination of Cu, Pb, Cd, Zn, Fe and Mn in the supporting electrolyte solution contained ethylenediamine or ethylenediamine-HCl was presented. The linear relationship between the stripping peak height and the concentration is in the range of 0.1-2600 ng/ml for Fe, 0.05-3200 ng/m1 for Mn, 0.2-2800 ng/ml for Cu, 0.1-3600 ng/ml for Pb, 0.05-1200 ng/ml for Cd, 0.2-4200 ng/ml for Zn, respectively. The elements in Water and biological samples can be detected using this method.