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Eclética Química

Print version ISSN 0100-4670On-line version ISSN 1678-4618

Abstract

SACZK, Adelir Aparecida; OLIVEIRA, Marcelo Firmino de; OKUMURA, Leonardo Luiz  and  STRADIOTTO, Nelson Ramos. Voltammetric behavior of 2-furfuraldehide reduction in ethanol using glassy carbon electrode. Eclet. Quím. [online]. 2002, vol.27, n.spe, pp.141-151. ISSN 1678-4618.  http://dx.doi.org/10.1590/S0100-46702002000200012.

This study reports the electrochemical behavior of 2-furfuraldehide reduction in ethanol using glassy carbon electrode, aiming to correlate adequate experimental conditions for determination of this 2-furfuraldehide in fuel ethanol. Obtained voltammograms for 2-furfuraldehide in a scan rate of 100mV.s-1 present a cathodic peak current in a potential of -1,45V vs. SCE for aqueous medium and -1,71V vs. SCE for alcoholic medium, being observed no anodic currents in these reactional media. The relation of ipc with v1/2 showed linear behavior in both media, exhibiting a mass transport controlled by diffusion. The analysis of electrochemical parameters obtained in this work has exhibited an irreversible behavior for the electrodic process. The dependence of cathodic peak current against concentration showed linearity in the interval of 9,5x10-4 to 5,8x10-3 mol L-1 for both media. The sensitivity of method on the aqueous and alcoholic medium was 13,4 and 13,0 (x 10-3) mA mol-1 L respectively. The limits of detection (L.D.) for 2-furfuraldehide, on the aqueous and alcoholic medium was 0,70 e 0,80 (x 10-3) mol L-1 respectively.

Keywords : 2-furfuraldehide; fuel ethanol; ciclic voltammetry; glassy carbon electrode.

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