Determination of 2-amino-5-nitrothiazole by square-wave cathodic stripping voltammetry |
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Authors: | P. Herná ndez, M. J. Gonzá lez de la Huebra, J. Vicente, M. H. Blanco L. Herná ndez |
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Affiliation: | (1) Departamento de Química Analítica, Facultad de Ciencias, Universidad Autónoma de Madrid, E-28049 Madrid, Spain |
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Abstract: | An electrochemical method has been developed for the detection and determination of 2-amino-5-nitrothiazole (2,5-ANT) by adsorption square-wave voltammetric stripping. The best sensitivity/resolution ratio was obtained by adsorption at pH 8.0 using a phosphate buffer, an accumulation potential of –10 mV (vs. Ag/AgCl 3 mol/l) and an accumulation time of 15 s. Under these conditions, the proposed method provides a linear electrode response over the 2,5-ANT concentration range 5–300 ng ml–1, and a detection and determination limit of 4 and 7.5 ng ml–1, respectively. The method was applied to the determination of 2,5-ANT in bacon. |
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