Sand as a solid support in ultrasound-assisted MSPD: A simple, green and low-cost method for multiresidue pesticide determination in fruits and vegetables.

Autor: Dos Santos EO; Program in Technological and Environmental Chemistry, Escola de Química e Alimentos, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Universidade Federal do Rio Grande, Av Itália, km 8, Rio Grande, Rio Grande do Sul 96201-900, Brazil., Gonzales JO; Program in Technological and Environmental Chemistry, Escola de Química e Alimentos, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Universidade Federal do Rio Grande, Av Itália, km 8, Rio Grande, Rio Grande do Sul 96201-900, Brazil., Ores JC; Program in Technological and Environmental Chemistry, Escola de Química e Alimentos, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Universidade Federal do Rio Grande, Av Itália, km 8, Rio Grande, Rio Grande do Sul 96201-900, Brazil., Marube LC; Program in Technological and Environmental Chemistry, Escola de Química e Alimentos, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Universidade Federal do Rio Grande, Av Itália, km 8, Rio Grande, Rio Grande do Sul 96201-900, Brazil., Caldas SS; Program in Technological and Environmental Chemistry, Escola de Química e Alimentos, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Universidade Federal do Rio Grande, Av Itália, km 8, Rio Grande, Rio Grande do Sul 96201-900, Brazil., Furlong EB; Program in Technological and Environmental Chemistry, Escola de Química e Alimentos, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Universidade Federal do Rio Grande, Av Itália, km 8, Rio Grande, Rio Grande do Sul 96201-900, Brazil., Primel EG; Program in Technological and Environmental Chemistry, Escola de Química e Alimentos, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Universidade Federal do Rio Grande, Av Itália, km 8, Rio Grande, Rio Grande do Sul 96201-900, Brazil. Electronic address: eprimelfurg@gmail.com.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2019 Nov 01; Vol. 297, pp. 124926. Date of Electronic Publication: 2019 May 31.
DOI: 10.1016/j.foodchem.2019.05.200
Abstrakt: Sand was studied as a solid support in ultrasound-assisted matrix solid-phase dispersion (UA-MSPD) for the extraction of different pesticide classes, including organophosphates, carbamates, triazoles and pyrethroids from fruits and vegetables, with determination by GC-MS and LC-MS/MS. The performance of sand was compared with that of different types of classic solid supports and alternative natural materials from renewable sources. The best results were obtained using 0.5 g sample, 1 g sand as a solid support, 20 mg activated charcoal and 5 mL ethyl acetate as elution solvent. Recoveries ranged from 55 to 140% with an RSD ≤ 20%. LOQs varied from 0.005 to 0.5 mg kg -1 for all analytes. Thiamethoxam, captan, chlorpyrifos, dimethoate and pyrimethanil were found in strawberry samples at concentrations from 0.01 to 0.06 mg kg -1 . Acephate and tebuconazole were found in a tomato sample at concentrations of 0.45 and 0.30 mg kg -1 , respectively. The method developed was efficient, simple, cheap, robust, and environmentally friendly.
(Copyright © 2019 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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