SBSE-GC-ECD/FPD in the analysis of pesticide residues in Passiflora alata Dryander herbal teas

J Agric Food Chem. 2003 Jan 1;51(1):27-33. doi: 10.1021/jf020630f.

Abstract

Stir bar sorptive extraction (SBSE) in combination with GC-ECD/FPD analysis is here applied to the determination of the residues of 11 pesticides (hexachlorobenzene, lindane, chlorothalonil, parathion methyl, parathion ethyl, fenitrothion, malathion, dieldrin, alpha- and beta-endosulfan, and tetradifon) in herbal teas prepared with Passiflora alata Dryander spiked leaves. The method was optimized using spiked herbal teas in a range from 0.05 to 1 pg/microL for organochlorine pesticides and from 0.15 to 3 pg/microL for organophosphorus pesticides. The method is reproducible and repeatable with recoveries calculated from herbal teas prepared with spiked plant material versus spiked herbal teas, varying from about 30% for tetradifon to about 90% for parathion methyl and malathion. The limits of quantitation (LOQs) ranged from 0.017 pg/microL for lindane to 0.117 pg/microL for malathion.

MeSH terms

  • Beverages / analysis*
  • Chromatography, Gas / methods*
  • Gas Chromatography-Mass Spectrometry
  • Passiflora / chemistry*
  • Pesticide Residues / analysis*
  • Plant Leaves / chemistry*
  • Quality Control
  • Reproducibility of Results
  • Water / analysis

Substances

  • Pesticide Residues
  • Water