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

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.

Automated summary

This study introduces a new analytical method for determining cadmium in flaxseed flour, which is considered to be simpler, faster, cost-effective, and environmentally friendly compared to current methods.