Electroanalytical determination of cadmium(II) and lead(II) using an in-situ bismuth film modified edge plane pyrolytic graphite electrode.

Journal article

A highly sensitive and simple electroanalytical methodology is presented using an in-situ bismuth film modified edge plane pyrolytic graphite electrode (BiF-EPPGE) which is exemplified with the simultaneous determination of cadmium(II) and lead(II). Square-wave anodic stripping voltammetry is utilised with the effects of several experimental variables studied. Simultaneous additions of cadmium(II) and lead(II) were investigated where two linear ranges between 0.1-100 and 0.1-300 microg/L and also detection limits of 0.062 and 0.084 microg/L were obtained, respectively. The method was then successfully applied to the simultaneous determination of cadmium(II) and lead(II) in spiked river water, where recoveries of 100.5 and 98% were obtained, respectively. This electroanalytical protocol using edge plane pyrolytic graphite electrodes is one of the simplest methodologies to date using non-mercury based electrodes and is simpler and cheaper than alternatives such as carbon nanotube electrode arrays, suggesting the use of edge plane pyrolytic graphite electrode for routine sensing.

Authors: Kachoosangi, RT; Banks, C; Ji, X; Compton, R

• Publication status: Published
• Journal: Analytical sciences : the international journal of the Japan Society for Analytical Chemistry
• Volume: 23
• Issue: 3
• Pages: 283-289
• Publication date: 2007-03-01
• DOI: 10.2116/analsci.23.283
• EISSN: 1348-2246
• ISSN: 0910-6340
• Language: English
• Keywords: Lead; Electrodes; Bismuth; Cadmium; Graphite