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  Home > JCE Print > Journal of Chemical Education > Issues > 1998  > August  >
In the Laboratory
Laboratory Made Electrochemical Sensors for Adsorptive Stripping Voltammetry
Teresa Goscinska
Deakin University, School of Biological and Chemical Sciences, Geelong, Victoria 3217, Australia
Cover
August 1998
Vol. 75 No. 8
p. 1038
Abstract
A novel method of adsorptive stripping voltammetry with a medium exchange preconcentration for the analytical detection of ferrocene in a small sample is presented. A laboratory prepared carbon paste electrode or a clay modified carbon paste electrode (referred to as a sensor) is used as a working electrode. The method consists of two principal steps: (1) nonelectrolytic preconcentration of the analyte of interest by adsorption /extraction from ethanolic solution, (2) quantitation of the surface confined analyte via anodic stripping differential pulse voltammetry in a conventional three electrode electrochemical cell with aqueous electrolyte solution. A visible enhancement of the voltammetric response of ferrocene and 100-fold increase in sensitivity is observed at the sensor, compared to the conventional carbon paste electrode. A possibility of electrode saturation is addressed.
More Information
*  Citation
 Goscinska, Teresa. J. Chem. Educ. 1998 75 1038.
*  Keywords
 Electrochemistry, Laboratory Instruction, Laboratory Equipment/Apparatus
*  History
 Created:
Last Updated:		 June 22, 1999
June 24, 2005
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