%0 Journal Article
%T Evaluation of cadmium, lead, copper, iron and zinc in Turkish dietary vegetable oils and olives using electrothermal and flame atomic absorption spectrometry
%A Acar
%A Orhan
%J Grasas y Aceites
%D 2012
%I Consejo Superior de Investigaciones Cient赤ficas
%R 10.3989/gya.047512
%X The Cd, Pb, Cu, Fe and Zn contents of some edible vegetable oils (soybean, sunflower, flower, nut, corn and olive) and of olives (olive-1, black, green, black crushed with seeds and green crushed with seeds) were determined and evaluated by an electrothermal atomic absorption spectrometer (ETAAS) using an Sc + Ir + NH4H2PO4 chemical modifier mixture and flame atomic absorption spectrometer (FAAS) after microwave digestion. The pyrolysis and atomization temperatures of Cd, Pb and Cu in sample solutions with and without the modifier mixture were investigated. The limits of detection (LOD) for analytes found are 0.1, 0.6, 0.9, 15.0 and 12.0 米g L每1 for Cd, Cu, Pb, Fe and Zn, respectively. The accuracy of the procedure proposed was confirmed by analyzing bovine liver 1577b standard reference material (SRM) and a spiked sample solution. The results of the analytes found were compared with certified and added values. The relative standard deviations of the analytes found were lower than 7% and the percent of recoveries obtained ranges from 96 to 101%. The Sc + Ir + NH4H2PO4 mixture proposed was applied for the determination of Cd, Pb and Cu in oils and olives. The results of analytes found in the samples were compared with international and national food quality guidelines as well as with literature values. Se han determinado los metales Cd, Cu, Pb, Fe y Zn en aceites vegetales comestibles (soja, girasol, flores, nueces, ma赤z y aceite de oliva) y aceitunas (aceitunas-1, negra, verde, negra machacadas con semillas y verde machacadas con semillas) mediante espectrometr赤a de absorci車n at車mica electrot谷rmica (ETAAS) utilizando como modificador qu赤mico la mezcla Sc + Ir + NH4H2PO4 y mediante espectrometr赤a de absorci車n at車mica de llama (FAAS) tras digesti車n con microondas. Se estudiaron las temperaturas de pir車lisis y atomizaci車n para Cd, Pb y Cu en disoluci車n con y sin modificador. Los l赤mites de detecci車n (LOD) fueron: 0.1, 0.6, 0.9, 15.0 y 12.0 mg L每1 para Cd, Cu, Pb, Fe y Zn, respectivamente. La precisi車n del procedimiento propuesto se confirm車 mediante el an芍lisis de materiales est芍ndar de referencia (SRM) 1577b de h赤gado de bovino y mediante una soluci車n de muestra sembrada. Los resultados se compararon con los valores certificados. Las desviaciones est芍ndar fueron inferiores al 7% y el rango de las recuperaciones obtenidas de 96 a 101%. La mezcla propuesta Sc + Ir + NH4H2PO4 se aplica a la determinaci車n de Cd, Pb y Cu en los aceites y en aceitunas. Los resultados encontrados en las muestras se compararon con los recogidos en las reglamentaciones internaciona
%K Chemical modifier
%K ETAAS and FAAS
%K Metals
%K Oils and olives
%K Aceites y aceitunas
%K ETAAS y Faas
%K Metales
%K Modificador Qu赤mico
%U http://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1392/1388