title: Adsorptive stripping voltammetric determination of copper(II) ion using phenyl pyridyl ketoneoxime (PPKO).
abstract: A sensitive and selective procedure is presented for the voltammetric determination of copper(II) ion. The procedure involves an adsorptive accumulation of Cu2+-PPKO on a hanging mercury drop electrode, followed by a stripping voltammetric measurement of reduction current of adsorbed complex at about -0.30 V (vs. SCE). The optimum conditions for the analysis of copper(II) ion include pH (5.8-7.0), 60 microgM PPKO and an accumulation potential of -0.5 V (vs. SCE). The peak current is proportional to the concentration of copper over the range 0.3-76 ng mL(-1) with a detection limit of 0.01ng mL(-1) with an accumulation time of 60 s. The speciation of different forms of complex between copper(II) ion and PPKO, using the Best (Martell program), followed pH measurement were examined. The method was applied to the determination of copper(II) ion content in real samples successfully.
authors.affiliation: Chemistry Department, University of Yasouj, Yasouj 75914-353, Iran. m.ghaedi@mail.yu.ac.ir
authors.forename: Mehrorang
authors.initials: M
authors.lastname: Ghaedi
authors.forename: Mohammad K
authors.initials: MK
authors.lastname: Amini
authors.forename: Ali
authors.initials: A
authors.lastname: Rafi
authors.forename: Shiva
authors.initials: S
authors.lastname: Gharaghani
authors.forename: Ardashir
authors.initials: A
authors.lastname: Shokrollahi
mesh_terms: D000327:Adsorption; D002623:Chemistry Techniques, Analytical / Q000379:methods; D003300:Copper / Q000032:analysis* / Q000737:chemistry*; D004563:Electrochemistry; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000032:analysis
chemical_list: D007477:Ions; D003300:Copper