000			01558nab a2200205 4500
005			20260520000839.0
008			260224s2009 xxu
245	0	0	_aDetermination of as in vegetable oil and biodiesel by graphite furnace atomic absorption spectrometry
260			_a _b _cnov./dic. 2009
270			_a09/06/2010 ; 09/06/2010
300			_a5 p. ; 5942-5946
520			_aTranscripción del resumen del autor. In this work, an alternative procedure for the determination of As in vegetable oils and biodiesel of different origins by graphite furnace atomic absorption spectrometry (GFAAS) is proposed. The sample stabilization was achieved by the formation of three component solutions prepared mixing the samples with appropriate volumes of propan-1-ol and nitric acid. Palladium was used as a chemical modifier. Pyrolysis and atomization temperatures as well as the sample dilution factor were investigated and optimized. Because no adequate certified reference material was available, accuracy was assessed by recovery tests, using both organic and inorganic species. Recoveries ranged from 95 to 110%. The limit of detection in the original sample was 0.3 mg kg-1, which is adequate for the analysis of vegetable oils and biodiesel, according to the expected Brazilian legislation.
581			_a6
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aVieria, Mariana Antunes _942379
100	1		_aCastro de Oliveira, Lígia Claudia _942380
100	1		_aGonçalves, Rodrigo Araújo _942381
999			_c170837 _d170837