Mattos, Cleiton dos Santos [UNESP]do Carmo, Devaney Ribeiro [UNESP]de Oliveira, Marcelo FirminoStradiotto, Nelson Ramos [UNESP]2014-05-202014-05-202008-03-01International Journal of Electrochemical Science. Belgrade: Electrochemical Science Group, v. 3, n. 3, p. 338-345, 2008.1452-3981http://hdl.handle.net/11449/10145This work presents a methodology for iron determination in fuel ethanol using a modified carbon paste electrode with 1.10 fenantroline/nafion. The electrochemical parameters were optimized for the proposed system and the voltammetric technique of square wave was employed for iron determination. An accumulation time of 5 minutes, such as a 100 mV of pulse magnitude (E(sw)) and frequency (f) of 25 Hz were used as optimized experimental conditions. The modified carbon paste electrode presented linear dependence of amperometric signal with iron concentration in a work range from 6.0x10(-6) until 2.0x10(-5) mol L(-1) of iron, exhibiting a linear correlation coefficient of 0.9884, a detection limit of 2.4 x10(-6) mol L(-1) (n = 3) and amperometric sensibility of 4.5x10(5) mu A/mol L(-1). Analytical curve method was used for iron determination at a commercial fuel sample. Flame atomic absorption spectroscopy was employed as comparative technique.338-345engironfuel ethanolcarbon paste electrode1,10 fenantrolinesquare wave voltammetryArtigoWOS:000256383800011Acesso abertoWOS000256383800011.pdf05450467205195360072173018005712