Combination of supramolecular solvent-based microextraction and ultrasound-assisted extraction for cadmium determination in flaxseed flour by thermospray flame furnace atomic absorption spectrometry

Autor(es)

Lemes, Leonardo Francisco Rafael ; Tarley, Cesar Ricardo Teixeira

• Tipo de documento: Artigo Científico
• Fonte: Food Chemistry; v. 357, p. 8-pg., 2021-04-15.

Resumo

This study describes the development of a new analytical method for cadmium determination in flaxseed flour based on ultrasound-assisted extraction combined with supramolecular preconcentration followed by thermospray flame furnace atomic absorption spectrometry. Cadmium from flaxseed flour was extracted by ultrasoundassisted radiation in acid medium (1.5 mol L- 1HNO3) followed by liquid-liquid microextraction of the acid extract with dodecanoic acid/THF supramolecular solvent using diethyl dithiophosphate as a chelating agent. The limit of detection and the analytical curve range were found to be 0.10 mu g L-1 and 0.35 to 20.0 mu g L-1, respectively. The cadmium concentration in the flaxseed flours was ranged from 0.11 +/- 0.04 to 0.79 +/- 0.03 mu g g-1. The proposed method is considered simpler, faster, low-cost, and environmentally friendly compared to procedures currently used for the determination of cadmium based on acid digestion and using graphite furnace atomic absorption spectrometry and inductively coupled plasma mass spectrometry. (AU)

• Processo FAPESP: 14/50867-3 - INCT 2014: Instituto Nacional de Ciência e Tecnologia de Bioanalítica
• Beneficiário: Marco Aurelio Zezzi Arruda
• Modalidade de apoio: Auxílio à Pesquisa - Temático