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Sensitive Determination of Zinc(II) in Real Samples Using a Poly(4‐vinylpyridine)/Mercury Film Electrode

2003; Wiley; Volume: 50; Issue: 3A Linguagem: Inglês

10.1002/jccs.200300056

2192-6549

Jyh‐Myng Zen, Dong‐Mung Tsai, Hsueh‐Hui Yang,

Conducting polymers and applications

Abstract A poly(4‐vinylpyridine)/mercury film electrode (PVP/MFE) was applied for the determination of trace amounts of zinc ion by square‐wave anodic stripping voltammetry. The PVP/MFE shows better mechanical stability, higher sensitivity, and enhanced resistance to common ions and surface‐active compounds than conventional mercury film electrodes. Various experimental parameters affecting the performance of the PVP/MFE in Zn(II) determination were optimized. Under the optimized conditions, the PVP/MFE shows a linear response up to 50 μg l −1 with a detection limit (S/N = 3) of 1.7 μg l −1 . The practical applicability of the electrode was evaluated through the analytical estimation of Zn(II) in various real samples.