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.
