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Voltammetric Detection of Ethinylestradiol in Water and Synthetic Urine Samples using a Ni(II) Phthalocyanine/Iron Oxide Nanocomposite Electrode |
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| Authors: | Camila de L. Ribeiro Jurandir R. de Souza Marcelo A. Pereira-da-Silva Leonardo G. Paterno |
| Affiliation: | 1. Laboratório de Química Analítica e Ambiental, Instituto de Química, Universidade de Brasília, Brasília-DF, 70910-900 Brazil;2. Instituto de Física de São Carlos, IFSC, Universidade de São Paulo, 13560-9700, - São Carlos-SP, Brazil Centro Universitário Central Paulista – UNICEP, 13563-470, - São Carlos-SP, Brazil;3. Laboratório de Pesquisa em Polímeros e Nanomateriais, Instituto de Química, Universidade de Brasília, Brasília-DF, 70910-900 Brazil |
| Abstract: | A novel nickel phthalocyanine/iron oxide nanoparticle (NiTsPc/ION) nanocomposite electrode is proposed for the voltammetric detection of ethinyl estradiol. The method shows a wide linear range (0.07–30 μmol L−1, R2 >0.99), sensitivity of 0.308 μA cm−2/μmol L−1 and limit of detection of 7.8 nmol L−1 (3.3 Sb/b). Recoveries are above 95 % for quantification in tap and treatment plant water samples and synthetic urine. A single electrode can be used in seven consecutive runs (RSD=2.85 %) and responses of different electrodes vary only 7–9 %. The excellent sensing performance of the proposed sensor is ascribed to its porous morphology and efficient charge-transfer between ION and NiTsPc. |
| Keywords: | ethinyl estradiol iron oxide nanoparticles phthalocyanine sensors voltammetry |