Simultaneous determination of copper and cadmium in environmental water and tea samples by adsorptive stripping voltammetry

Authors

MOHAMMAD BAGHER GHOLIVAND
ALIREZA POURHOSSEIN
MOHSEN SHAHLAEI

Abstract

A sensitive and selective method for the simultaneous determination of copper and cadmium in seawater, river water, and tea samples is described. The method is based on the adsorptive accumulation of 2,2--dithiosalicylic acid complexes of these elements onto a hanging mercury drop electrode, followed by reduction of adsorbed species by voltammetric scan using differential pulse modulation. Optimal analytical conditions were as follows: ligand concentration of 11 nM, pH of 9.5, and an adsorption potential at --300 mV versus Ag/AgCl, with an accumulation time of 60 s. The peak currents are proportional to the concentration of copper and cadmium over the 1-80 and 1-240 ng mL^{-1} ranges with detection limits of 0.5 and 0.3 ng mL^{-1}, respectively.

DOI

10.3906/kim-1004-553

Keywords

Copper, cadmium, 2, 2--dithiosalicylic acid, stripping voltammetry, seawater, river water, tea

First Page

839

Last Page

846

Recommended Citation

GHOLIVAND, MOHAMMAD BAGHER; POURHOSSEIN, ALIREZA; and SHAHLAEI, MOHSEN (2011) "Simultaneous determination of copper and cadmium in environmental water and tea samples by adsorptive stripping voltammetry," Turkish Journal of Chemistry: Vol. 35: No. 6, Article 2. https://doi.org/10.3906/kim-1004-553
Available at: https://journals.tubitak.gov.tr/chem/vol35/iss6/2