title: Investigating the potential of metal-organic framework material as an adsorbent for matrix solid-phase dispersion extraction of pesticides during analysis of dehydrated Hyptis pectinata medicinal plant by GC/MS.
abstract: Metal-organic frameworks aluminum terephthalate MIL-53 and Cu-benzene-1,3,5-tricarboxylate (BTC) were tested for extraction of pyrimethanil, ametryn, dichlofluanid, tetraconazole, flumetralin, kresoximmethyl, and tebuconazole from the medicinal plant Hyptis pectinata, with analysis using GC/MS in the selected ion monitoring mode. Experiments carried out at different fortification levels (0.1, 0.5, and 1.0 microg/g) resulted in recoveries in the range 61 to 107% with RSD values between 3 and 12% for the metal-organic framework materials. Detection and quantification limits ranged from 0.02 to 0.07 and 0.05 to 0.1 microg/g, respectively, for the different pesticides studied. The method developed was linear over the range tested (0.04-20.0 microg/g), with correlation coefficients ranging from 0.9987 to 0.9998. Comparison of MIL-53 and Cu-BTC with C18-bonded silica showed good performance of the MIL-53 metal-organic framework as a sorbent for the pesticides tested.
authors.affiliation: Universidade Federal de Sergipe, Departamento de Química, 49100-000, São Cristóvão, SE, Brazil.
authors.forename: Adriano
authors.initials: A
authors.lastname: Aquino
authors.forename: Jordana Alves
authors.initials: JA
authors.lastname: Ferreira
authors.forename: Sandro
authors.initials: S
authors.lastname: Navickiene
authors.forename: Kaline A
authors.initials: KA
authors.lastname: Wanderley
authors.forename: Gilberto F
authors.initials: GF
authors.lastname: de Sá
authors.forename: Severino A
authors.initials: SA
authors.lastname: Júnior
mesh_terms: D000327:Adsorption; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D031331:Hyptis / Q000737:chemistry*; D008670:Metals / Q000737:chemistry*; D010573:Pesticide Residues / Q000737:chemistry; D010575:Pesticides / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry; D052616:Solid Phase Extraction / Q000379:methods*
chemical_list: D008670:Metals; D010573:Pesticide Residues; D010575:Pesticides