Spectrophotometric determination of cadmium with uramyldiacetic acid |
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| Authors: | Adela Bermejo-Barrera F. Bermejo-Martinez Mercedes Molina-Poch |
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| Affiliation: | Department of Analytical Chemistry, Faculty of Chemistry, University of Santiago de Compostela, Santiago de Compostela, Spain |
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| Abstract: | A procedure for the determination of cadmium(II) by uv spectrophotometry is proposed. This metal reacts at pH 6 with uramyldiacetic acid (UDA) to give a complex with a maximal absorbance at 265 nm and follows Beer's law in the range 0.12–3.6 μg Cd(II)/ml, the optimal interval being from 0.6 to 3.3 μg Cd(II)/ml. The sensitivity is 0.011 μg cm?2. Through this study the stoichiometry of the chelate compound, interfering elements, and the reproducibility of the method were evaluated. The method has been applied to the determination of cadmium in biological samples and a white metal. |
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