Anodic Stripping Voltammetry Determination of Pb(II) and Cd(II) at a Bismuth/Poly(aniline) Film Electrode

Abstract

A novel voltammetric method—anodic—using a bismuth/poly(aniline) film electrode has been developed for simultaneous measurement of Pb(II) and Cd(II) at low µg L⁻¹ concentration levels by stripping voltammetry. The results confirmed that the bismuth/poly(aniline) film electrode offered high‐quality stripping performance compared with the bismuth film electrode. Well‐defined sharp stripping peaks were observed for Pb(II) and Cd(II), along with an extremely low baseline. The detection limits of Pb(II) and Cd(II) are 1.03 µg L⁻¹ and 1.48 µg L⁻¹, respectively. The bismuth/poly (aniline) electrode has been applied to the determination of Pb(II) in tap water samples with satisfactory results.

Keywords:

• Bismuth/poly(aniline) electrode
• anodic stripping voltammetry
• Pb(II)
• Cd(II)

Acknowledgment

This project was supported by the Municipal Science Foundation of Chongqing City (no. CSTC‐2004BB8646, CSTC‐2004BA4024).