Abstract
A new selective reagent, S,S′-bis(2-aminophenyl)oxalate (H 2L), for the extractive spectrophotometric determination of copper has been prepared. The ligand, H 2L, forms a 1:1 complex with copper(II) in methanol. The molar absorptivity of Cu(II)- S,S′-bis(2-aminophenyl)oxalate complex in methanol is 5365 M −1 cm −1 at 504 nm. The method has been applied for the determination of copper in pharmaceutical formulations, environmental and foodstuff samples.
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