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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。
In this paper, a new method for the spectrophotometric determination of Cu (Ⅱ) with Cu (Ⅱ) -Alizarin red-rhodamine B-polyvinyl alcohol ternary complex was proposed. The method has high sensitivity (Σ = 1.23 X 104L · mol-1 · cm-1), good selectivity and high precision, and is used for the determination of trace Cu (Ⅱ) in water with satisfactory results.