Rodriguez A M, de Torres A G, Pavon J M, Ojeda C B
Department of Analytical Chemistry, Faculty of Sciences, University of Málaga, 29071 Málaga, Spain.
Talanta. 1993 Dec;40(12):1861-6. doi: 10.1016/0039-9140(93)80108-4.
A method for the simultaneous spectrophotometric determination of cadmium, copper and zinc based on the formation of their complexes with 1,5-bis(di-2-pyridylmethylene)thiocarbonohydrazide is proposed. The absorption curves of these complexes overlap severely in the scanning range 380-480 nm. The analyte concentrations are calculated by a least squares fit of the pure spectra to the mixture spectra. A linear determination range of 0.1-1.7 mug/ml for cadmium, 0.1-1.3 mug/ml for copper and 0.2-1.2 mug/ml for zinc were obtained. The effect of interference was studied. The method has been applied to the determination of these metal ions in various type of materials.
提出了一种基于镉、铜和锌与1,5-双（二-2-吡啶基亚甲基）硫代碳酰肼形成络合物的同时分光光度法测定镉、铜和锌的方法。这些络合物的吸收曲线在380-480nm扫描范围内严重重叠。通过将纯光谱与混合光谱进行最小二乘法拟合来计算分析物浓度。镉的线性测定范围为0.1-1.7μg/ml，铜为0.1-1.3μg/ml，锌为0.2-1.2μg/ml。研究了干扰效应。该方法已应用于各种类型材料中这些金属离子的测定。
