Abstract
A simple and highly sensitive extraction spectrophotometric method was developed for the determination of traces of cadmium. The method is based on the preconcentrative extraction of ternary-ion-association complex of cadmium—1,10-phenanthroline-thymol blue into chloroform and subsequent determination by spectrophotometry. The ternary ion associate is stable for 20 h and cadmium content as low as 0.1 μg in 90 ml of sample can be determined. The method is precise and has been applied to the determination of cadmium in sea water, solder and high purity zinc and indium materials.
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Mathew, L., Rao, T.P., Iyer, C.S.P. et al. Liquid-liquid extraction and spectrophotometric determination of cadmium with 1,10-phenanthroline and thymol blue. Mikrochim Acta 111, 231–237 (1993). https://doi.org/10.1007/BF01245311
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DOI: https://doi.org/10.1007/BF01245311