Voltammetric determination of 17 alpha-ethinylestradiol hormone in supply dam using BDD electrode

Voltammetric determination of 17 alpha-ethinylestradiol hormone in supply dam using BDD electrode

Author Perez, Caroline Autor UNIFESP Google Scholar
Simoes, Fabio Ruiz Autor UNIFESP Google Scholar
Codognoto, Lucia Autor UNIFESP Google Scholar
Abstract In this work, a simple method for electroanalytical determination of 17 alpha-ethinylestradiol (EE2) hormone in natural waters was developed using a boron-doped diamond electrode (BDD). The analyses were performed using square wave voltammetry and the parameters were optimized. The results showed a well-defined irreversible oxidation peak (BR buffer 0.1 mol L-1, pH 8.0) at +0.65 V (vs. Ag/AgCl). The voltammetric results showed also that the oxidation process is controlled by adsorption of species and indicated that there are two electrons involved. The obtained analytical curves for 17 alpha-ethinylestradiol presented good linearity in the concentration range 9.9 x 10(-7) to 5.2 x 10(-6) mol L-1 in utlrapure water and 7.9 x 10(-7) to 5.2 x 10(-6) mol L-1 in natural water samples (supply dam). Detection limits (DL) obtained were between 2.4 x 10(-7) and 7.5 x 10(-7) mol L-1 and quantification limits (QL) between 7.9 x 10(-7) and 2.5 x 10(-6) mol L-1. The recovery experiments showed values between 86 and 114 % for spiked samples thus indicating the applicability of the electroanalytical methodology to quantify 17 alpha-ethinylestradiol directly in natural water of supply Dam (Billings Dam in Diadema-SP. Brazil), without any preconcentration or derivatization.
Keywords Estrogens
17 alpha-ethinylestradiol
Boron-doped diamond electrodes
Natural waters
Amperometric detector
Hormones
Language English
Date 2016
Published in Journal Of Solid State Electrochemistry. New York, v. 20, n. 9, p. 2471-2478, 2016.
ISSN 1432-8488 (Sherpa/Romeo, impact factor)
Publisher Springer
Extent 2471-2478
Origin http://dx.doi.org/10.1007/s10008-015-3091-5
Access rights Closed access
Type Article
Web of Science ID WOS:000382130000012
URI http://repositorio.unifesp.br/handle/11600/51115

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