title: Preliminary characterization of anhydrous ethanol used in Brazil as automotive fuel.
abstract: This work reports preliminary studies on the characterisation of anhydrous ethanol (AEA) used as an automotive fuel mixed with gasoline in Porto Alegre (South Brazil). Pre-concentration of the impurities contained in 1000 ml of AEA was carried on through solid-phase extraction using XAD4 resin. The main compounds in the extract were identified by means of spectral data from the library of the equipment. The concentrate was then fractionated using a preparative liquid chromatographic column filled with activated silica gel and the elution procedure was carried out with, n-hexane, n-hexane-benzene (1:1, v/v) and dichloromethane. Prior to analysis by GC-MS, each fraction was reduced to 1 ml with a gentle stream of nitrogen. Saturated linear hydrocarbons and aromatic hydrocarbons eluted in the first fraction and oxygenated compounds such as aldehydes. ketones and alcohols, eluted in the second one. were the main compounds detected in the sample.
authors.affiliation: Instituto de Química da Universidade Federal do Rio Grande do Sul, Av, Bento Gonçalves 9550, Porto Algre 90501-970, Brazil.
authors.forename: Rossana B C
authors.initials: RB
authors.lastname: Vilar
authors.forename: Rosângela
authors.initials: R
authors.lastname: da Silva
authors.forename: Patricia
authors.initials: P
authors.lastname: Schossler
authors.forename: Renato
authors.initials: R
authors.lastname: Cataluña Veses
authors.forename: Clarisse
authors.initials: C
authors.lastname: Piatnicki
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Samios
authors.forename: Elina B
authors.initials: EB
authors.lastname: Caramão
mesh_terms: D001938:Brazil; D002853:Chromatography, Liquid; D000431:Ethanol / Q000737:chemistry*; D005742:Gasoline
chemical_list: D005742:Gasoline; D000431:Ethanol