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Screen-Printed Carbon Electrode Modified with Poly-L-histidine Applied to Gold(III) Determination
(Soc Brasileira Quimica, 2009-01-01)
O presente trabalho reporta o desenvolvimento de um novo método voltamétrico para análise de íons ouro(III) usando eletrodo de carbono impresso modificado com poli-L-histidina. O procedimento é baseado no acúmulo do complexo ...
Platinum surface modification with cerium species and the effect against the methanol anodic reaction
(Elsevier B.V. Sa, 2008-06-15)
Spontaneous deposition and electrochemical deposition by potential perturbation programs were used to place cerium-containing species on platinum surfaces in acid solution. Cyclic voltammetric profiles of cerium-modified ...
Preconcentration of rutin at a poly glutamic acid modified electrode and its determination by square wave voltammetry
(Taylor & Francis Inc, 2007-01-01)
The voltammetric determination of rutin in 0.04 mol l(-1) B-R buffer (pH 4.0) by square wave voltammograms (+0.41 V vs. Ag/AgCl(sat.)) at a poly glutamic acid modified glassy carbon electrode was found to be several orders ...
Copper determination in ethanol fuel samples by anodic stripping voltammetry at a gold microelectrode
(Springer Wien, 2009-01-01)
A linear sweep anodic stripping voltammetric method was developed for copper determination in commercial ethanol fuel samples by using a gold microelectrode. Under the optimized conditions, a linear range from 0.05 to 1.0 ...
Determination of isoniazid in human urine using screen-printed carbon electrode modified with poly-L-histidine
(Elsevier B.V. Sa, 2010-02-01)
A sensitive voltammetric method for trace measurements of isoniazid (INZ) in synthetic human urine sample is described. The method is based on its electroreduction at -0.98 V vs. Ag/AgCl on screen-printed carbon electrode ...
Eletroanálise de derivados acetaldeído com hidrazina e determinação em amostras de álcool combustível por voltametria de onda quadrada
(Sociedade Brasileira de Química, 2006-07-01)
A square wave voltammetric method is described for the determination of acetaldehyde using the derivatization reaction with hydrazine sulphate, based on the reduction of hydrazone generated as a product that exhibits a ...
Simultaneous determination of quinoline and pyridine compounds in gasoline and diesel by differential pulse voltammetry
(Wiley-Blackwell, 2007-03-01)
The presence of trace basic organonitrogen compounds such as quinoline and pyridine in derivative petroleum fuels plays an important role in maintaining the engines of vehicles. However, these substances can contaminate ...
Determination of acetaldehyde in fuel ethanol by high-performance liquid chromatography with electrochemical detection
(Japan Soc Analytical Chemistry, 2005-04-01)
The cyclic voltammetric behavior of acetaldehyde and the derivatized product with 2,4-dinitrophenylhydrazine (DNPHi) has been studied at a glassy carbon electrode. This study was used to optimize the best experimental ...
Determination of brilliant blue FCF in the presence and absence of erythrosine and quinoline yellow food colours by cathodic stripping voltammetry
(Taylor & Francis Ltd, 2002-09-01)
A study of the voltammetric behaviour of the food colours brilliant blue FCF (C.I. 42090), erythrosine (C. I. 45430) and quinolin e yellow (C. I. 47005) in the pH range 2-10 have been carried out by cathodic stripping ...
Simultaneous determination of neutral nitrogen compounds in gasoline and diesel by differential pulse voltammetry
(Elsevier B.V., 2007-05-15)
The presence of trace neutral organonitrogen compounds as carbazole and indole in derivative petroleum fuels plays an important role in the car's engine maintenance. In addition, these substances contribute to the environmental ...