Abstract
In the present work, a method was developed for the determination of Ca, Fe, Mg, and Zn in edible oil samples using ultrasound-assisted emulsification followed by extraction induced by emulsion breaking (EIEB) and detection by high-resolution continuous source flame atomic absorption spectrometry (HR-CS FAAS). Multivariate tools were used to optimize the variables involved in the extraction performance. Constrained mixture design allows obtaining the proportions of the liquids (5.5 mL of sample, 2.5 mL of 3.0 mol L−1 HNO3, and 2.0 mL of 1.0% Triton X-114) to the emulsion formation. Doehlert design optimized the variables acid concentration (1.0 mol L−1), sonication time (12 min), and emulsion breaking temperature (90 °C). The limits of quantification obtained were 14.4 and 25.0, 36.7, and 26.3 μg L−1 for Ca, Fe, Mg, and Zn, respectively. The accuracy was accessed by addition/recovery tests, obtaining values in the range of 87–113%.
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Acknowledgements
The authors acknowledge the financial support of the Fundação de Amparo à Pesquisa do Estado da Bahia (FAPESB), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Grant Number 304582/2018-2), and Financiadora de Estudos e Projetos (FINEP).
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This work was supported by the Brazilian National Research Council (CNPq) (Grant Number 304582/2018–2).
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da Mata Cerqueira, U.M.F., Valasques, G.S., de Souza, C.T. et al. Extraction Induced by Emulsion Breaking for Ca, Fe, Mg, and Zn Determination in Edible Oils Using High-Resolution Continuous Source Flame Atomic Absorption Spectrometry. Food Anal. Methods 15, 1098–1106 (2022). https://doi.org/10.1007/s12161-021-02216-9
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DOI: https://doi.org/10.1007/s12161-021-02216-9