Fast and versatile multiresidue method for the analysis of botanical insecticides on fruits and vegetables by HPLC/DAD/MS

J Agric Food Chem. 2005 Nov 2;53(22):8644-9. doi: 10.1021/jf051345+.

Abstract

A simple multiresidue method for screening analysis of 12 botanical insecticides used by organic farmers has been developed. The method involves a rapid and small-scale extraction procedure with acetonitrile. For all fruit and vegetable samples, there was no need for clean up. Rotenone, azadirachtin, ryanodines, and pyrethrins can be separated by high-performance liquid chromatography, quantified, and confirmed with a diode array detector (DAD) and atmospheric pressure chemical ionization mass spectrometry (APCI-MS) in the select ion-monitoring mode (SIM). The majority of pesticide recoveries for various fruits and vegetables were >70% in the concentration range from 0.01 to 5 mg/kg. The limit of quantitation for most of the pesticides was 0.01 mg/kg, with the majority of relative standard deviations (RSD) mostly below 10%.

MeSH terms

  • Chromatography, High Pressure Liquid / methods*
  • Fruit / chemistry*
  • Insecticides / analysis*
  • Limonins / analysis*
  • Mass Spectrometry / methods*
  • Pyrethrins / analysis
  • Rotenone / analogs & derivatives
  • Rotenone / analysis
  • Ryanodine / analysis
  • Vegetables / chemistry*

Substances

  • Insecticides
  • Limonins
  • Pyrethrins
  • Rotenone
  • Ryanodine
  • deguelin
  • azadirachtin