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

J AOAC Int. 2012 Sep-Oct;95(5):1338-42. doi: 10.5740/jaoacint.sge_aquino.

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Gas Chromatography-Mass Spectrometry / methods*
  • Hyptis / chemistry*
  • Metals / chemistry*
  • Pesticide Residues / chemistry
  • Pesticides / chemistry*
  • Plants, Medicinal / chemistry
  • Solid Phase Extraction / methods*

Substances

  • Metals
  • Pesticide Residues
  • Pesticides