Collect. Czech. Chem. Commun.
2011, 76, 1177-1186
https://doi.org/10.1135/cccc2011066
Published online 2011-09-19 09:49:54
Electrochemical determination of cadmium(II) using dithizone assisted ion transfer and eletrolyte dropping electrode
Feifei Shua, Shaoai Xieb and Jinping Jiaa,*
a School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuang road, Shanghai 200240, P. R. China
b School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuang road, Shanghai 200240, P. R. China
Abstract
The transfer of Cd(II) assisted by dithizone (DzH2) present in methyl isobutyl ketone (MIBK) at water–MIBK interface was systematically investigated by novel electrolyte dropping electrode (EDE) using cyclic voltammetry (CV) and square wave voltammetry (SWV). The protonation of DzH2 at polarized liquid–liquid interface was studied. The stoichiometry of resulting metal ligand complex was formulated. Transfer peak current was proportional to the bulk concentration of the Cd(II) varied between 1 μM to 0.1 mM and the maximum value of relative standard deviation was about 3.17%. The presented procedure was successfully applied for determination of Cd(II) in real samples.
Keywords: Electrochemistry; Sensors; Cadmium; Electrolyte dropping electrode; Liquid–liquid interface; Complex formation; Assisted ion transfer.
References: 19 live references.
