Atomic absorption spectrophotometric determination of microgram quantities of copper in tea after solvent extraction |
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Authors: | A M Aziz-Alrahman |
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Abstract: | An atomic absorption spectrophotometric method is described for determining trace amounts of copper in tea. The method is based on the solvent extraction of the metal as tetraiodocuprate (I), from 2 M HCl solutions of tea samples which contain 12% (w/v) KI, into methylisobutyl ketone. The organic extracts, containing the ion-association complex of copper are atomized into an air-acetylene flame. The limit of detection is 1.14 micrograms g-1 Cu. |
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