Spectrophotometric determination of zirconium with alizarin red S in the presence of polyvinylpyrrolidone |
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| Authors: | J Hernández Méndez B Moreno Cordero L Gutierrez Dávila |
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| Institution: | Department of Analytical Chemistry, Faculty of Sciences, University of Salamanca, Salamanca Spain |
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| Abstract: | The absorbance of the microcolloidal zirconium/alizarin red S/polyvinylpyrrolidone complex is measured at 525 nm in acetate buffered medium at pH 4.75. The molar absorptivity is 3.8 × 104 l mol?1 cm?1, which is much greater than that of the classical method. Sulphate and fluoride do not interfere. |
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