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STUDY ON THE PHOTOMETRIC DETERMINATION OF NICKEL WITH A NEW RHODANINE REAGENT

Jinghua Yu, Qingyu Ou

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Abstract

A new rhodanine reagent, 3-(4′-fluorophenyl)-5-(2′-carboxyphenylazo)-rhodanine, was synthesized and its color reaction with nickel(Ⅱ) was studied. In an ammoniacal buffer medium of pH 9.0 and in the presence of non-ionic surfactant OP, a sensitive color reaction between Ni(Ⅱ) and the above mentioned rhodanine reagent was observed. The absorption maxima of the colored complex was found at 440nm while that of the reagent itself was found at 370nm. Linearity was obtained between the absorbances and the concentrations of Ni(Ⅱ) in the range of 0 to 25μg of Ni(Ⅱ) per 10ml of solution. The apparent molar absorptivity was found to be 2.3×10~4L·mol~(-1)·cm~(-1). The above mentioned reaction under the optimum condition studied has been applied to the analysis of tea and water samples.

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What this paper is about

A new rhodanine reagent, 3-(4′-fluorophenyl)-5-(2′-carboxyphenylazo)-rhodanine, was synthesized and its color reaction with nickel(Ⅱ) was studied. In an ammoniacal buffer medium of pH 9.0 and in the presence of non-ionic surfactant OP, a sensitive color reaction between Ni(Ⅱ) and the above mentioned rhodanine reagent was observed. The absorption maxima of the colored complex was found at 440nm while that of the reagent itself was found at 370nm. Linearity was obtained between the absorbances and the concentrations of Ni(Ⅱ) in the range of 0 to 25μg of Ni(Ⅱ) per 10ml of solution. The apparent molar absorptivity was found to be 2.3×10~4L·mol~(-1)·cm~(-1). The above mentioned reaction under the optimum condition studied has been applied to the analysis of tea and water samples.

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Available abstract

A new rhodanine reagent, 3-(4′-fluorophenyl)-5-(2′-carboxyphenylazo)-rhodanine, was synthesized and its color reaction with nickel(Ⅱ) was studied. In an ammoniacal buffer medium of pH 9.0 and in the presence of non-ionic surfactant OP, a sensitive color reaction between Ni(Ⅱ) and the above mentioned rhodanine reagent was observed. The absorption maxima of the colored complex was found at 440nm while that of the reagent itself was found at 370nm. Linearity was obtained between the absorbances and the concentrations of Ni(Ⅱ) in the range of 0 to 25μg of Ni(Ⅱ) per 10ml of solution. The apparent molar absorptivity was found to be 2.3×10~4L·mol~(-1)·cm~(-1). The above mentioned reaction under the optimum condition studied has been applied to the analysis of tea and water samples.

Key concepts: Rhodanine, Reagent, Chemistry, Molar absorptivity, Nickel, Color reaction, Spectrophotometry, Nuclear chemistry

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