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Transactions of the INDIAN CERAMIC SOCIETY   Vol. 51  1992
Spectrophotometric Determination of Copper and Silver in Glass after Extraction of Dithizonate Complexes on Polyurethane Foam
DIP ALI KUNou AND S. K. Rov
Pages : 46-49
DOI : 10.1080/0371750X.1992.10804532
Abstract
A spectrophotometric method has been described for the determination of minor or trace amount of copper and silver when present together In special glasses. The method involves selective extraction of copper dlthlzonate on polyurethane foam after maskingofsllverwith chloride. Silver Is extracted in ammoniacal medium after masking of copper with EDTA. Both the complexes, I.e. copper and silver dithizonates are eluted from foam with acetone. Determinations are carried out spectrophotometrically. Beers law Is obeyed for the concentration range of 0.05- 2.5 IJ.g Cu/ml at 550 nm and 0.10- 6.0 IJ.g Ag/ml at 500 nm. The method yields agreeable results.
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