Renewable drops electrochemical sensor for sulfide ions detection
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Data
2003-06-01
Autores
Milani, M. R.
Stradiotto, Nelson Ramos [UNESP]
Cardoso, Arnaldo Alves [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Wiley-Blackwell
Resumo
The design and characteristics of a novel electrochemical system, which uses a drop as a renewable electroanalytical sensor, are described. This article describes the performance of the electrochemical system, the coupling of the experimental arrangement with flow injection technique and a demonstration of its applicability for the measurement of sulfide. The method is based on renewable drops of ferricyanide ions, buffered by borate. The ferrocyanide ions, product of the reaction between ferricyanide and sulfide ions, are oxidized on a platinum microelectrode and the current measured is related to sulfide concentration. The measurements can be done in continuous or static flow mode. In continuous mode, the detection limit is 5.0 x 10(-5) mol L-1.
Descrição
Palavras-chave
ferricyanide, flow injection analysis (FIA), microelectrodes
Como citar
Electroanalysis. Weinheim: Wiley-v C H Verlag Gmbh, v. 15, n. 9, p. 827-830, 2003.