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KMID : 1059519930370010112
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Journal of the Korean Chemical Society
1993 Volume.37 No. 1 p.112 ~ p.118
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Spectrophotometric and Derivative Spectrophotometric determination of Copper with N,N'-Oxalylbis(2-Pyridyl-3'-sulphobenzoylhydrazone)
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Kim Yong-Nam
Choi Kyu-Seong
Choi Seung-Choon
Chung Ryou-Jin
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Abstract
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A water-soluble chromogenic reagent, N,N'-oxalylbis(2-pyridyl-3'-sulphobenzoylhydrazone) has been synthesized. Spectrophotometric and first-and second-derivative spectrophotometric methods for the determination of copper with the reagent have been developed. Determination has been performed by measuring the absorbance and the first-and second-derivative values of the copper complexes in aqueous solutions (pH 1.89) at 379, 395, 363 and 421 nm, respectively. The method allows the determination of 0.12-1.20 μg/ml of copper and has been applied to the analysis of aluminium alloy samples. The best results have been obtained from the measurements of the second-derivative values at 421 nm
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