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随水相酸度、反应物浓度增大,钕-偶氮氯膦Ⅲ络合物颜色变深,光密度增大。以乙二胺四乙酸钠作竞争络合反应,推计出Nd-CPAⅢ络合物的不稳定常数平均值为1.39×10~(17)。
With the acidity of the aqueous phase, the concentration of the reactants increases and the color of the neodymium-chlorophosphonazo III complex becomes darker and the optical density increases. With ethylenediaminetetraacetic acid as competitive complexation reaction, the average unstable constant of Nd-CPAⅢ complex was estimated to be 1.39 × 10 ~ (17).