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.
Nohut
S
S
Karadeniz Technical University, Department of Chemistry, Trabzon, Turkey.
Karaböcek
S
S
Güner
S
S
Gök
Y
Y
D003300:Copper / Q000032:analysis* / Q000302:isolation & purification; D004785:Environmental Pollutants / Q000032:analysis; D005504:Food Analysis; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D008024:Ligands; D010070:Oxalates / Q000032:analysis*; D010944:Plants / Q000737:chemistry; D015203:Reproducibility of Results; D012997:Solvents; D013056:Spectrophotometry, Ultraviolet
D004785:Environmental Pollutants; D007202:Indicators and Reagents; D008024:Ligands; D010070:Oxalates; C405982:S,S'-bis(2-aminophenyl)oxalate; D012997:Solvents; D003300:Copper