Sensitive detection of estriol hormone in creek water using a sensor platform based on carbon black and silver nanoparticles

Author(s):Show less -

Raymundo-Pereira, Paulo A. ; Campos, Anderson M. ; Vicentini, Fernando C. ; Janegitz, Bruno C. ; Mendonca, Camila D. ; Furini, Leonardo N. ; Boas, Naiza V. ; Calegaro, Marcelo L. ; Constantino, Carlos J. L. ; Machado, Sergio A. S. ; Oliveira, Jr., Osvaldo N.

• Document type: Journal article
• Source: Talanta; v. 174, p. 652-659, NOV 1 2017.
• Web of Science Citations: 13

Abstract

We report the electrochemical detection of estriol using carbon black nanoballs (CNB) decorated with silver nanoparticles (AgNP) as electrode material. Homogeneous, porous films on glassy carbon electrodes (GCE) were obtained, with diameters of 20 - 25 nm for CNB and 5 - 6 nm for AgNP. CNB/AgNP electrodes had increased conductivity and electroactive area in comparison with bare GCE and GCE/CNB, according to cyclic voltammetry and electrochemical impedance spectroscopy. The oxidation potential peak was also down shifted by 93 mV, compared to the bare GC electrode. Differential pulse voltammetry data were obtained in 0.1 mol L-1 PBS (pH 7.0) to detect estriol without the purification step, in the linear range between 0.2 and 3.0 mu mol L-1 with detection and quantification limits of 0.16 and 0.5 mu mol L-1 (0.04 and 0.16 mg L-1), respectively. The sensor was used to detect estriol in a creek water sample with the same performance as in the official methodology based on high performance liquid chromatography. (AU)

• FAPESP's process: 16/01919-6 - Design and fabrication of nanostructured flexible devices for biomarkers detection
• Grantee: Paulo Augusto Raymundo Pereira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 14/05197-0 - Development of electrochemical sensors based in mesoporous sílica containing graphene for analysis of bisphenol A
• Grantee: Anderson Massahiro de Campos
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 13/14262-7 - Nanostructured films from biologically-relevant materials
• Grantee: Osvaldo Novais de Oliveira Junior
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 16/12759-0 - Development of an advanced electroanalytical methodology for quantification of the hormones 17²-estradiol and 17±-etinilestradiol in supply water samples using electrodes modified with graphene, gold nanoparticles and quantum dots
• Grantee: Sergio Antonio Spinola Machado
• Support Opportunities: Regular Research Grants
• FAPESP's process: 15/19099-2 - Development of electrochemical sensors and biosensors for different analytical purposes
• Grantee: Bruno Campos Janegitz
• Support Opportunities: Regular Research Grants
• FAPESP's process: 12/17689-9 - Preparation and characterization of bifunctional-nanostructured surfaces of Au-Pt obtained via templates for application in sensors and biosensors
• Grantee: Paulo Augusto Raymundo Pereira
• Support Opportunities: Scholarships in Brazil - Doctorate