01558nab a2200205 4500 20260520000839.0 260224s2009 xxu Determination of as in vegetable oil and biodiesel by graphite furnace atomic absorption spectrometry nov./dic. 2009 09/06/2010 ; 09/06/2010 5 p. ; 5942-5946 Transcripción 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. 6 Energy & fuels 23 ARTICULO Vieria, Mariana Antunes 42379 Castro de Oliveira, Lígia Claudia 42380 Gonçalves, Rodrigo Araújo 42381 170837 170837 0 0 0 0 238656 BAAB BAAB 2026-03-05 200045691 0 200045691 2026-03-05 15:13:11 2026-03-05 ARTICULO