Microwave-assisted extraction based on emulsion breaking with natural deep eutectic solvent for vegetable oil sample preparation prior to elemental determination by ICP OES

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Costa, Floriatan Santos ; Moreira, Luana Santos ; Ludovico, Leticia Lima ; Volpe, Jaqueline ; de Oliveira, Ana Claudia ; dos Santos, Mayara Padovan ; da Silva, Erik Galvo Paranhos ; Souto, Denio Emanuel Pires ; Grassi, Marco Tadeu ; Gonzalez, Mario Henrique ; Amaral, Clarice D. B.

• Tipo de documento: Artigo Científico
• Fonte: Talanta; v. 266, p. 10-pg., 2023-08-29.

Resumo

This study presents a novel and efficient method for the extraction of Al, Ca, Cr, Cu, K, Mg, Mn, and Zn in vegetable oil samples using a Natural Deep Eutectic Solvent (NADES) as an extractor combined with microwave radiation (MW) in an emulsion system. The NADES prepared with choline chloride:oxalic acid:water (1:1:4 molar ratio) provided a high extraction rate using 5.0 mL of the sample, 1.7 mL of NADES, and 1.3 mL of Triton X-100. The optimum conditions were obtained with 36 s of vortexing, 5 min of extraction, and 10 s for emulsion-breaking in MW. Under these conditions, recoveries ranged from 91% to 110% and relative standard de-viations <9.0% were obtained. The limit of quantification (mg kg-1) was: 0.018 (Al), 0.032 (Ca), 0.007 (Cr), 0.006 (Cu), 0.013 (K), 0.027 (Mg), 0.002 (Mn), and 0.019 (Zn). The proposed method showed comparable results to reference methods and advantages, such as speed, low cost, and simplicity. The combination of NADES and MW represents a sustainable and innovative approach to the elemental determination composition of vegetable oils and contributes to advances in sample preparation methods. (AU)

• Processo FAPESP: 14/50945-4 - INCT 2014: Instituto Nacional de Tecnologias Alternativas para Detecção, Avaliação Toxicológica e Remoção de Micropoluentes e Radioativos
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 21/14759-5 - Solventes e técnicas de extração sustentáveis em química analítica verde para determinação de contaminantes emergentes e inorgânicos em amostras ambientais
• Beneficiário: Mario Henrique Gonzalez
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/22113-8 - Solventes eutéticos naturais: síntese, caracterização e aplicações na determinação de As, Cd, Cr, Hg, Se e V em amostras ambientais por ICP-MS
• Beneficiário: Mario Henrique Gonzalez
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/18531-3 - Química analítica verde: do preparo de amostras a determinações de elementos-traço por espectrometria de massas com plasma indutivamente acoplado (ICP-MS)
• Beneficiário: Mario Henrique Gonzalez
• Modalidade de apoio: Auxílio à Pesquisa - Regular