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Voltammetric Determination of 4-Nitrophenol Using a Novel Type of Silver Amalgam Paste Electrode

✍ Scribed by Abdul Niaz; Jan Fischer; Jiří Barek; Bogdan Yosypchuk; Sirajuddin; Muhammad Iqbal Bhanger

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
173 KB
Volume
21
Category
Article
ISSN
1040-0397

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✦ Synopsis

Abstract

A differential pulse voltammetric (DPV) method was developed for the determination of 4‐nitrophenol (4‐NP) at a newly developed silver amalgam paste electrode (AgA‐PE) in Britton–Robinson buffer pH 3.0. The electrode is based on a disposable plastic pipette tip filled with paste amalgam based on a mixture of mercury and fine silver powder (9 : 1, w/w). The experimental parameters, such as pH of Britton–Robinson buffer and activation and regeneration potential of the electrode surface were optimized. The reduction peak current dependences were linear for the concentration of 4‐NP from 0.2 to 100 μM. The method showed reproducible results with RSD (n=45) of 1.7%. The limit of determination (LOD) was 0.3 μM. The method was successfully applied for the direct determination of 4‐NP in drinking water.

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