Extraction—spectrophotometric determination of cadmium with diphenylcarbazone in the presence of 1,10-phenanthroline |
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| Authors: | Etsu Yamada Tooru Kuwamoto Taitiro Fujinaga Eiichiro Nakayama |
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| Institution: | Department of Chemistry, Faculty of Science, Kyoto University, Kyoto 606 Japan;Research Center for Instrumental Analysis, Faculty of Science, Kyoto University, Kyoto 606 Japan |
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| Abstract: | The addition of 1,10-phenanthroline improves both the extraction and the spectrophotometric sensitivity of the determination of cadmium with diphenylcarbazone. Slope analysis suggests the formation of a 1:2:2 extracted species. The molar absorptivity is 9.4 × 104 l cm-1 mol-1 at 536 nm and extraction is maximal at pH 8.2–9.8. Extraction is rapid and absorbances remain constant at room temperature for 48 h. Various divalent metal ions interfere. |
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