Electrochemical sensor highly selective for estradiol valerate determination based on a modified carbon paste with iron tetrapyridinoporphyrazine

文献情報

出版日 2008-10-09

DOI 10.1039/B804462G

インパクトファクター 4.616

著者

Isabelle V. Batista, Marcos R. V. Lanza, Iara L. T. Dias, Sônia M. C. N. Tanaka, Auro A. Tanaka, Maria D. P. T. Sotomayor

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要旨

This work reports the use of iron tetrapyridinoporphyrazine (FeTPyPz) as a highly selective catalyst in the construction of an electrochemical sensor for estradiol valerate (EV) determination. The sensor was prepared by modifying a carbon paste with FeTPyPz. The best results were obtained in a mixture of acetonitrile (MeCN) and 0.1 mol L−1 phosphate buffer solution (pH 6.0) in a volume ratio of 47 : 53. A linear response range was observed between 45 and 450 μmol L−1 with a sensitivity of 12160 ± 306 μA L mol−1 and quantification and detection limits of 45 and 13 μmol L−1, respectively. The repeatability, expressed as the relative standard deviation (RSD) for n = 10, was 5.9% ([EV] = 50 μmol L−1). The reproducibility (RSD) for the sensor construction was better than 4% and the operational stability (RSD) over 50 measurements was 1.8%. A detailed investigation regarding the selectivity and electrochemical characteristics was carried out. Finally, in a first step to evaluate the application potential of the sensor, it was successfully applied to determine EV in a commercial formulation.

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CiteScore: 7.8

自己引用率: 5.6%

年間論文数: 653

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Electrochemical sensor highly selective for estradiol valerate determination based on a modified carbon paste with iron tetrapyridinoporphyrazine

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