Sensitive quantification of trace zinc in water samples by adsorptive stripping voltammetry.
A simple and sensitive adsorptive stripping voltammetry method was developed for determination of Zn using N-nitrozo-N-phenylhydroxylamine (cupferron) as a selective complexing agent. This complex absorbed on the hanging mercury drop electrode and created a sensitive peak current. The peak current and concentration of zinc accorded with a linear relationship in the range of 0.85-320 ng mL(-1). The influence of pH and the nature of supporting electrolytes, concentration of ligand, preconcentration time and applied potential were investigated. The relative standard deviation at a concentration level of 50 ng mL(-1) was 1.8%. The method was applied to the determination of zinc in city, river and mineral water samples, with satisfactory results.
Department of Chemistry, Faculty of Sciences, Ilam University, Ilam, Iran E-mail: s.abbasi@mail.ilam.ac.ir.
Shahryar
S
Abbasi
Department of Chemistry, Hamedan Branch, Islamic Azad University, Hamedan, Iran.
Abbas
A
Farmany
Department of Chemistry, Faculty of Sciences, Ilam University, Ilam, Iran E-mail: s.abbasi@mail.ilam.ac.ir.
Mahmoud
M
Roushani
Young Researchers Club, Hamedan Branch, Islamic Azad University, Hamedan, Iran.
Seyede Shima
SS
Mortazavi
D004563:Electrochemistry / Q000379:methods*; D004573:Electrolytes; D008628:Mercury / Q000737:chemistry; D009602:Nitrosamines / Q000737:chemistry; D015032:Zinc / Q000737:chemistry*
D004573:Electrolytes; D009602:Nitrosamines; D008628:Mercury; D015032:Zinc; C031808:cupferron