Issue 8, 2000

Splitless large-volume GC-MS injection for the analysis of organophosphorus and organochlorine pesticides in vegetables using a miniaturised ethyl acetate extraction

Abstract

A simple, rapid and sensitive multiresidue method has been developed for the determination of ten organophosphorus and organochlorine pesticides, commonly used in crop protection. The analysis uses a miniaturised extraction with ethyl acetate followed by large volume injection (10 μL) GC-EI-MS analysis in SIM (selective ion monitoring) mode. Sensitivity and selectivity of the method were acceptable with limits of detection (LODs) lower than 0.01 mg kg−1, except for endosulfan α and β (0.05 mg kg−1). Average recoveries of between 63–99% were obtained and good linearity was observed in the range from 0.01 to 1.00 mg kg−1. Repeatability and reproducibility studies yielded relative standard deviations lower than 20% in all the cases. The method was applied to the analysis of 110 tomato, pepper and cucumber samples, as part of the monitoring programme of the Association of Producers and Exporters of Fruits and Vegetables of Almería.

Article information

Article type
Paper
Submitted
03 Apr 2000
Accepted
07 Jun 2000
First published
12 Jul 2000

Analyst, 2000,125, 1397-1402

Splitless large-volume GC-MS injection for the analysis of organophosphorus and organochlorine pesticides in vegetables using a miniaturised ethyl acetate extraction

A. Agüera, L. Piedra, M. D. Hernando, A. R. Fernández-Alba and M. Contreras, Analyst, 2000, 125, 1397 DOI: 10.1039/B002611P

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