Electroanalysis and determination of acetaldehyde in fuel ethanol using the reaction with 2,4-dinitrophenylhydrazine
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/09/2006
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Resumo |
The voltammetric reduction of acetaldehyde was studied in 0.1 M LiOH: LiCl (60: 40 v/v). Welldefined waves can be seen at -1.77 and -1.60 V with the use of hanging mercury and glassy carbon electrodes. Acetaldehyde was shown to react at room temperature with the 2,4-dinitrophenylhydrazine and the product exhibited a differential pulse voltammetric peak at -0.90V, which was well separated from the peaks of the derivative. This allowed the indirect determination of acetaldehyde in the presence of 0.1 M ethanol/tetrabutylammonium perchlorate after 10 min of reaction. Calibration graphs were obtained for 1.00 x 10(-6)-1.00 x 10(-4) M of acetaldehyde. The detection limit is 8.14 x 10(-7) M. The method has been applied satisfactorily to the determination of total aldehyde in fuel ethanol samples without any pretreatment. |
Formato |
889-895 |
Identificador |
http://dx.doi.org/10.1134/S1061934806090097 Journal of Analytical Chemistry. New York: Maik Nauka/interperiodica/springer, v. 61, n. 9, p. 889-895, 2006. 1061-9348 http://hdl.handle.net/11449/37426 10.1134/S1061934806090097 WOS:000240377800009 |
Idioma(s) |
eng |
Publicador |
Springer |
Relação |
Journal of Analytical Chemistry |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |