Voltammetric determination of 17β-estradiol in human urine and buttermilk samples using a simple copper(II) oxide-modified carbon paste electrode

被引:25
作者
Antoniazzi, Cristiane [1 ]
de Lima, Camila Alves [1 ]
Marangoni, Rafael [1 ]
Spinelli, Almir [2 ]
de Castro, Eryza Guimaraes [1 ]
机构
[1] Univ Estadual Centro Oeste, Dept Quim, Campus CEDETEG, BR-85040080 Guarapuava, PR, Brazil
[2] Univ Fed Santa Catarina, Dept Quim CFM, Campus Reitor Joao David Ferreira Lima, BR-88040900 Florianopolis, SC, Brazil
关键词
17; beta-Estradiol; Carbon paste electrode; CuO; Square-wave voltammetry; ENDOCRINE DISRUPTING CHEMICALS; NONENZYMATIC GLUCOSE SENSORS; FLOWER-LIKE CUO; ELECTROCHEMICAL SENSOR; GRAPHENE OXIDE; ESTROGENIC HORMONES; FACILE SYNTHESIS; SENSITIVE DETERMINATION; ESTRADIOL; NANOSTRUCTURES;
D O I
10.1007/s10008-017-3690-4
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
This paper reports the voltammetric determination of 17 beta-estradiol in urine and buttermilk samples using a simple detector based on a carbon paste electrode (CPE) modified with copper(II) oxide (CuO). The CuO was obtained by the Pechini method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive (EDS), Fourier transform infrared (FTIR), and Raman spectroscopies. Cyclic voltammetry (CV) and square-wave voltammetry (SWV) demonstrated that the CuO-modified carbon paste electrode (CuO/CPE detector) displayed much higher electrocatalytic activity in the 17 beta-estradiol oxidation reaction than the CPE without modification, exhibiting a low detection limit of 21.0 nmol L-1 with a wide linear range from 60.0 to 800.0 nmol L-1 (R = 0.998). Satisfactory results were obtained for the determination of 17 beta-estradiol in human urine and buttermilk samples. The proposed electrochemical detector offers high repeatability, stability, fast response, low cost, and potential for practical application in the quantification of this hormone.
引用
收藏
页码:1373 / 1383
页数:11
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