Artículos de revistas
Development Of A Selective And Sensitive Sensor For Urate Determination Based On Tris(1,10-phenantroline) Copper(ii) Bis(tetracyanoquinodimethanide) Adsorbed On Carbon Nanotubes
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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.
0103-5053
WOS:000364426900010
10.5935/0103-5053.20150184
Autor
Pimentel
Dilton M.; de Oliveira
Fernando M.; dos Santos
Wallans T. P.; Kubota
Lauro T.; Damos
Flavio S.; Luz
Rita C. S.
Institución
Resumen
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 26 10
2035 2045