Spectrofluorometric study of 1,4-diaminoanthraquinone-calcium complex in aqueous sulfuric acid mediums: Spectrofluorometric determination of calcium |
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| Authors: | M Romn Ceba A Fernndez-Gutirrez F Crdenas |
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| Institution: | Department of Analytical Chemistry, Faculty of Science of Badajoz, University of Extremadura, Badajoz, Spain |
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| Abstract: | The spectrofluorometric study was made of the complex 1,4-diaminoanthraquinone-Ca in aqueous sulfuric mediums λmax,ex = 410 nm; λmax,em = 580 nm; 50% H2O; stable for at least 4 hr; range temperature OPTIMUM = 20–35 °C; R]optimum = 2 × 10−4M; stoichiometry 2:1 (fluorescent complex) and 1:1 (no fluorescent complex)]. A new method for the spectrofluorometric determination of Ca traces is proposed for concentrations between 150 and 400 ppb. The relative error and the interferences of the method have been investigated. |
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