Cu(Ⅱ)-茜素红-罗丹明B-聚乙烯体系 光度法测定痕量铜

Determination of Trace Copper by Spectrophotomtric Method under the System of Cu(Ⅱ) － Alizarin Red - Rhodamine B - Polyethylene Glycols

本文提出了 Ｃu（Ⅱ）－茜素红－罗丹明 Ｂ－聚乙烯醇三元配合物体系光 度法测定Ｃｕ（Ⅱ）的新方法。该方法灵敏度高（Σ＝１．２３ Ｘ １０４Ｌ·ｍｏｌ－１·ｃｍ－１）， 选择性好，精密度可靠，用于测定水中痕量 Ｃu（Ⅱ），结果令人满意。

The new spectrophotometric method to determine Cu(Ⅱ) under the ternary complex system of Cu(Ⅱ) - Alizarin Red - Rhodamine B - Polyethylene Glycols is presented in the paper. The mothod, its sensitivity is high (Σ= 1. 23 x 104L. mol- l cm - 1 ), its selectivity is good and its precision is reliable, is used to determine the trace Cu(Ⅱ) in water, and its results are satisfactory.