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Issue 8, 2000
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Splitless large-volume GC-MS injection for the analysis of organophosphorus and organochlorine pesticides in vegetables using a miniaturised ethyl acetate extraction

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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.

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Publication details

The article was received on 03 Apr 2000, accepted on 07 Jun 2000 and first published on 12 Jul 2000


Article type: Paper
DOI: 10.1039/B002611P
Citation: Analyst, 2000,125, 1397-1402
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    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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