Lead determination in commercial juice samples by direct magnetic sorbent sampling flame atomic absorption spectrometry (DMSS-FAAS)

Fabrício Alves Borges; Lucimara Mendonça Costa; César Ricardo Teixeira Tarley; Giovana de Fátima Lima Martins; Eduardo Costa Figueiredo

doi:10.1016/j.foodchem.2023.135676

Lead determination in commercial juice samples by direct magnetic sorbent sampling flame atomic absorption spectrometry (DMSS-FAAS)

Food Chem. 2023 Jul 1:413:135676. doi: 10.1016/j.foodchem.2023.135676. Epub 2023 Feb 11.

Authors

Fabrício Alves Borges¹, Lucimara Mendonça Costa¹, César Ricardo Teixeira Tarley², Giovana de Fátima Lima Martins³, Eduardo Costa Figueiredo⁴

Affiliations

¹ Laboratory of Toxicant and Drug Analyses, Faculty of Pharmaceutical Sciences, Federal University of Alfenas, 37130-001 Alfenas, MG, Brazil; Institute of Chemistry, Federal University of Alfenas, 37130-001 Alfenas, MG, Brazil.
² Department of Chemistry, State University of Londrina, Rodovia Celso Garcia Cid. 445, Km 380, Londrina 86057-970, PR, Brazil.
³ Institute of Chemistry, Federal University of Alfenas, 37130-001 Alfenas, MG, Brazil.
⁴ Laboratory of Toxicant and Drug Analyses, Faculty of Pharmaceutical Sciences, Federal University of Alfenas, 37130-001 Alfenas, MG, Brazil. Electronic address: eduardo.figueiredo@unifal-mg.edu.br.

PMID: 36804744
DOI: 10.1016/j.foodchem.2023.135676

Abstract

The direct magnetic sorbent sampling flame atomic absorption spectrometry (DMSS-FAAS), recently proposed by our research group, was applied to determine the lead in soy-based juice, whole grape juice, reconstituted grape juice, and orange nectar samples. A dispersive solid phase extraction (d-SPE) of lead was carried out using a magnetic orange peel powder, developed and optimized by Gupta et al (2012), that was inserted into flame by FAAS with a magnetic probe. The limits of quantification (<4.6 μg L^-1) were smaller than maximum residue limits established in Brazil. Good precisions and accuracies were obtained. DMSS-FAAS presented a sensitivity at least 14 times greater than the d-SPE followed by conventional FAAS analysis, wherein the analytes were extracted and desorbed, and the eluate was introduced in FAAS via nebulization system. Lead was easily quantified in juice samples at very low concentrations, with satisfactory figures of merit, and without the need of a mineralization step.

Keywords: DMSS-FAAS; Direct magnetic sorbent sampling; Dispersive solid phase extraction; Juice; Lead; Magnetic biosorbent.

MeSH terms

Food
Magnetic Phenomena
Magnetics*
Solid Phase Extraction* / methods
Spectrophotometry, Atomic / methods