Home
Resources
Publications
Electrochemical Co-Detection of As(III), Hg(II) and Pb(II) on a Bismuth Modified Exfoliated Graphite Electrode

Electrochemical Co-Detection of As(III), Hg(II) and Pb(II) on a Bismuth Modified Exfoliated Graphite Electrode

Potlako J Mafa, Azeez O Idris, Nonhlangabezo Mabuba, Omotayo A Arotiba

Talanta. 2016 Jun 1;153:99-106.

PMID: 27130095

Abstract:

The applicability of a bismuth modified exfoliated graphite (EG) electrode for the co-detection of heavy metal ions -As(III), Hg(II) and Pb(II)-in water samples using square wave anodic stripping voltammetry (SWASV) is reported. Bismuth nanoparticles were deposited on an EG electrode potentiostatically at -1000mV for 300s to form EG-Bi electrode. The Bi modified EG electrode was characterised in 5mM ferrocene and used to as an electrochemical sensor for Pb(II) and Hg(II) individually in 0.1M acetate buffer solution (pH 5) with detection limits (LODs) of 0.83μgL(-1)., 0.46μgL(-1) and limit of quantification of 2.8μgL(-1) and 1.5μgL(-1) respectively. Simultaneous detection of Pb(II), As(III) and Hg(II) was also performed with LODs of 0.053μgL(-1), 0.014μgL(-1), 0.081μgL(-1) and LOQs of 0.18μgL(-1), 0.047μgL(-1) and 0.27μgL(-1) for Pb(II), As(III) and Hg(II) respectively. All the detections were performed under optimised experimental conditions. The stability of the EG-Bi sensor was tested and the electrode was applied to environmental samples. The results found with this method were comparable with those obtained with inductively coupled plasma - optical emission spectrometric technique.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP22306372	Bismuth(III) acetate		22306-37-2	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: