Extraction and spectrophotometric determination of copper(II) with S,S-bis(2-aminophenyl)oxalate.


A new selective reagent, S,S'-bis(2-aminophenyl)oxalate (H2L), for the extractive spectrophotometric determination of copper has been prepared. The ligand, H2L, 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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@article{Nohut1999ExtractionAS, title={Extraction and spectrophotometric determination of copper(II) with S,S-bis(2-aminophenyl)oxalate.}, author={Sinan Nohut and Serdar Karab{\"{o}cek and Saadettin G{\"{u}ner and Yaşar G{\"{o}k}, journal={Journal of pharmaceutical and biomedical analysis}, year={1999}, volume={20 1-2}, pages={309-14} }