Castilho, Michelle de Souza [UNESP]Yamanaka, Hideko [UNESP]Oliveira, Marcelo Firmino deZanoni, Maria Valnice Boldrin [UNESP]Stradiotto, Nelson Ramos [UNESP]2015-05-152015-05-152010Journal of Biofuels, v. 1, n. 2, p. 220-227, 2010.0976-3015http://hdl.handle.net/11449/123528In this work, an electrode chemically modified with polypyrrole (PCME) was employed for determination of sulfate in ethanol fuel using a FIA system. The PCME was prepared by polymerization of pyrrole at a glassy carbon electrode by means of cyclic voltammetry technique. An analytical curve from 1.0 x 10−5 to 8.0 x 10−5 mol L−1 was obtained in flow injection system based on the PCME. An amperometric sensibility of 2.3 x 10−3 A mol−1 L and a detection limit of 2.5 x 10−6 mol L−1 were achieved. The proposed method was employed for determination of sulfate ions in commercial samples of ethanol fuel. The results were in good agreement with those obtained by the ionic chromatographic method.220-227engEthanol fuelSulfate determinationPolypyrrole-filmFlow injection analysisArtigo10.5958/j.0976-3015.1.2.027Acesso restrito616720438620641484777324000954330072173018005712192372600003662511836724522481570000-0002-2296-1393