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 dithizonate on polyurethane foam after masking of silver with 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. Beer's law is obeyed for the concentration range of 0.05–2.5 μg Cu/ml at 550 nm and 0.10–6.0 μg Ag/ml at 500 nm. The method yields agreeable results.
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