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- Title
DETERMINATION OF Cd(II) USING SQUARE WAVE ANODIC STRIPPING VOLTAMMETRY AT A CARBON PASTE ELECTRODE CONTAINING Bi-DOPED CARBON XEROGEL.
- Authors
DEAC, AGLAIA RALUCA; COTEŢ, LIVIU COSMIN; TURDEAN, GRAZIELLA LIANA; MURESAN, LIANA MARIA
- Abstract
A novel carbon paste electrode (CPE) modified with Bi-doped carbon xerogel (BiCXe) is presented as a promising alternative to electrode materials used to replace mercury electrode in detection of heavy metals ions from aqueous solutions. The ex situ preparation of BiCXe was realized by solgel technique involving a reaction between a mixture of organic compounds (resorcinol, formaldehyde, glycerol formal) and a bismuth salt (Bi(NO3)3.5 H2O) in the presence of a catalyst (NH4OH), followed by gel washing, drying and pyrolysis at 550°C/ 2h/ in inert atmosphere (Ar). Electrochemical investigation of BiCXe-CPE was performed by cyclic voltammetry (CV) and square wave voltammetry (SWV), and the detection of Cd (II) ions by square wave anodic stripping voltammetry (SWASV) in acetate buffer 0.1 M (pH = 4.5). The electroanalytical parameters of the new sensor were determined. The favourable performance of the novel electrode coupled with the mercury-free surface make this sensor very attractive for environmental monitoring of toxic Cd(II) ions.
- Subjects
SQUARE waves; CARBON electrodes; VOLTAMMETRY; ORGANIC compounds; ELECTROMAGNETIC waves
- Publication
Studia Universitatis Babes-Bolyai, Chemia, 2015, Vol 60, Issue 1, p203
- ISSN
1224-7154
- Publication type
Article