Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/242768
Type: Artigo de periódico
Title: Development Of A Selective And Sensitive Sensor For Urate Determination Based On Tris(1,10-phenantroline) Copper(ii) Bis(tetracyanoquinodimethanide) Adsorbed On Carbon Nanotubes
Author: Pimentel
Dilton M.; de Oliveira
Fernando M.; dos Santos
Wallans T. P.; Kubota
Lauro T.; Damos
Flavio S.; Luz
Rita C. S.
Abstract: The present work describes the development of a selective electrochemical sensor for urate based on tris(1,10-phenantroline) copper(II) bis(tetracyanoquinodimethanide) (Cu(phen)(3)(TCNQ)(2)) adsorbed on multi-walled carbon nanotubes (CNT). The composite material was characterized by infrared spectroscopy, scanning electron microscopy, and electrochemical impedance spectroscopy. The composite material showed an excellent electrocatalytic activity toward oxidation of urate. The heterogeneous charge transfer rate constant (k') between the analyte and the sensor was determined using linear sweep voltammetry experiments. The composite material shows a linear range from 5 up to 2500 mu mol L-1 with limit of detection of 1.05 mu mol L-1 and limit of quantification of 3.50 mu mol L-1. The high sensitivity and selectivity of the sensor for urate was sufficient for its determination
Subject: Uric-acid Determination
Ascorbic-acid
Modified Electrode
Electrochemical Synthesis
Dopamine
Graphene
Films
Nanoparticles
Microcrystals
Metabolism
Country: SAO PAULO
Editor: SOC BRASILEIRA QUIMICA
Citation: Development Of A Selective And Sensitive Sensor For Urate Determination Based On Tris(1,10-phenantroline) Copper(ii) Bis(tetracyanoquinodimethanide) Adsorbed On Carbon Nanotubes. Soc Brasileira Quimica, v. 26, p. 2035-2045 OCT-2015.
Rights: fechado
Identifier DOI: 10.5935/0103-5053.20150184
Address: http://www.crossref.org/iPage?doi=10.5935%2F0103-5053.20150184
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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