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Square-wave cathodic adsorptive stripping voltammetric determination of trace amounts of 2-mercaptobenzimidazole in water samples

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Abstract

A sensitive, simple and reproducible square-wave cathodic adsorptive stripping voltammetric method is developed for the determination of 2-mercaptobenzimidazole (MBIM) in different water samples using a static mercury drop electrode (SMDE) as a working electrode. The solution conditions and instrumental parameters were optimized for the determination of MBIM by square-wave cathodic adsorptive stripping voltammetry. This method is based on a sensitive adsorptive reduction peak of the MBIM at −0.532 V vs. Ag/AgCl reference electrode in a Britton-Robinson buffer at pH 10.0. The linear concentration range was 20–600 ng ml−1 when using 0.0 V as the accumulation potential. The detection limit of the method was calculated to be 8.41 ng ml−1. The precision was excellent with relative standard deviations (n = 20) of 2.30%, 1.71%, 2.25% and 1.33% at MBIM concentrations of 40, 90, 200 and 500 ng ml−1, respectively. The proposed voltammetric method is used for the determination of MBIM in different spiked water samples.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Sciences, Shahid Chamran University, Ahvaz, Iran

    H. Parham & B. Aibaghi-Esfahani

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  1. H. Parham
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  2. B. Aibaghi-Esfahani
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Correspondence to H. Parham.

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Parham, H., Aibaghi-Esfahani, B. Square-wave cathodic adsorptive stripping voltammetric determination of trace amounts of 2-mercaptobenzimidazole in water samples. JICS 5, 83–89 (2008). https://doi.org/10.1007/BF03245819

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  • DOI: https://doi.org/10.1007/BF03245819

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