Determination of Bismuth: A Mercury-Free Anodic Stripping Voltammetry Experiment

TCE

The Chemical Educator

ISSN: 1430-4171 (electronic version)

Table of Contents

Abstract Volume 9 Issue 2 (2004) pp 91-96

Determination of Bismuth: A Mercury-Free Anodic Stripping Voltammetry Experiment

Steven C. Petrovic

Department of Chemistry, Southern Oregon University, Ashland, OR 97520, petrovis@sou.edu
Received December 18, 2003. Accepted February 7, 2004.

Published online: 4 March 2004

Abstract. An anodic stripping voltammetry (ASV) experiment for the mercury-free determination of bismuth in an over-the-counter pharmaceutical product is described in this paper. A carbon-paste electrode (CPE) was used as a satisfactory replacement for mercury-based electrodes, which are commonly implemented for the determination of metal ions in ASV. The standard addition method was used in the determination of bismuth, which was present at the low part-per-million concentration level. Students also have the option of exploring the effect of scan rate, deposition time, and deposition potential on the ASV response at a CPE.

Key Words: Laboratories and Demonstrations; analytical chemistry; quantitative analysis; electroanalytical chemistry; anodic stripping voltammetry; carbon paste electrode; pharmaceutical; bismuth

(*) Corresponding author. (E-mail: petrovis@sou.edu)

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Supporting Materials:

A copy of the laboratory handout (zipped pdf file 140 KB) is included as supporting documentation.