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Food Chem ; 318: 126473, 2020 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-32143131

RESUMO

In this work is presented the development of a method for As and Se determination in crude palm oil samples by hydride generation atomic fluorescence spectrometry and Hg by cold vapor atomic fluorescence spectrometry after ultrasound-assisted emulsification and extraction induced by emulsion breaking (EIEB). The optimization of the method was carried out by multivariate designs. The developed method has presented limits of quantification (LOQ) of 0.72, 0.12, and 1.5 µg L-1 for As, Hg, and Se, respectively. The precisions of the proposed method expressed as repeatability were 0.92, 2.2, and 3.7% RSD for 2 µg L-1 (n = 10) of As, Hg and Se, respectively. The developed methodology was applied in palm oil samples collected in the Bahia State. Concentrations (µg L-1) found in the samples were between

Assuntos
Arsênio/análise , Emulsões/química , Análise de Alimentos/métodos , Mercúrio/análise , Óleo de Palmeira/análise , Selênio/análise , Fracionamento Químico/métodos , Análise de Alimentos/estatística & dados numéricos , Contaminação de Alimentos , Gases/química , Limite de Detecção , Análise Multivariada , Óleo de Palmeira/química , Espectrometria de Fluorescência/métodos , Espectrofotometria Atômica/métodos
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