Determinación de trazas metálicas en aceites vegetales de España y Marruecos mediante espectroscopía de absorción con cámara de grafito después de la digestión en horno de microondas
作者： K. Bakkali , E. Ballesteros , B. Souhail , N. Ramos Martos
DOI: 10.3989/GYA.031909
关键词: Detection limit 、 Sunflower oil 、 Atomic absorption spectroscopy 、 Olive oil 、 Microwave oven 、 Microwave digestion 、 Mineralogy 、 Chromatography 、 Pomace 、 Sunflower 、 Chemistry
摘要: A simple, rapid analytical method for determining traces of Cd, Cr, Cu, Mn and Pb in various types vegetable oils is proposed. Samples are digested a microwave oven then analyzed by atomic absorption spectroscopy with electrothermal atomization. The proposed exhibits good linearity sensitivity to the five metals, which it can determine detection limits over range 0.06-2.15 Ig/kg. Its precision, as relative standard deviation, ranges from 2.6 4.2%. accuracy was assessed using analyze reference material consisting Used Oil HU-1, contains certified metal concentrations, found be quite acceptable. applied determination metals virgin olive, sunflower, maize pomace olive Spain Morocco. Based on results, contents varied among oil and, oil, also country origin; samples Morocco contained especially high levels lead.
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