Square-wave voltammetry applied to the analysis of the dye marker, solvent blue 14, in kerosene and fuel alcohol
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Data
2007-09-01
Autores
Goncalves Trindade, Magno Aparecido
Boldrin Zanoni, Maria VaInice
Título da Revista
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Editor
Wiley-Blackwell
Resumo
The purpose of this paper is to develop an electroanalytical method based on square-wave voltammetry (SWV) for the determination of the solvent blue 14 (SB-14) in fuel samples. The electrochemical reduction of SB-14 at glassy carbon electrode in a mixture of Britton-Robinson buffer with N,N-dimethyiformamide (1:1, v/v) presented a well-defined peak at-0.40 V vs. Ag/AgCl. All parameters of the SWV technique were optimized and the electroanalytical method presented a linear response from 1.0 x 10(-6) to 6.0 x 10(-6) mol L-1 (r = 0.998) with a detection limit of 2.90 x 10(-7) mol L-1. The developed method was successfully utilized in the quantification of the dye SB-14 in kerosene and alcohol samples with average recovery from 93.00 to 98.10%.
Descrição
Palavras-chave
solvent blue 14, fuels, solid-phase extraction, electroanalytical method
Como citar
Electroanalysis. Weinheim: Wiley-v C H Verlag Gmbh, v. 19, n. 18, p. 1901-1907, 2007.