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Supercritical Fluid Extraction of Pesticide Residues from Strawberries

Pearce, K. L., Trenerry, V. C. and Were, S. T. (1997) Supercritical Fluid Extraction of Pesticide Residues from Strawberries. Journal of Agricultural and Food Chemistry, 45 (1). pp. 153-157. ISSN 0021-8561

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Article Link(s): https://doi.org/10.1021/jf9507093

Abstract

A supercritical fluid extraction (SFE) method for the determination in strawberries of a number of commonly used organochlorine insecticides, organophosphorus pesticides, and dichloroanilide fungicides is described. Gas chromatography was used to examine the extracts, with both electron-capture detection and either flame photometric or nitrogen phosphorus detection. Confirmation was performed by gas chromatography-mass spectrometry. The analytes were extracted with supercritical carbon dioxide at 4000 psi and 50 °C with a run time of 20 min, which corresponded to an extraction volume of 20−30 mL of carbon dioxide. In developing the method, the operating parameters of temperature, pressure, extraction time, collection solvent, and sample preparation were optimized. Recoveries ranged from 74 to 126% (with the exception of iprodione), and a method precision of ±3−18% was obtained for spiking levels of 0.08−3.7 mg/kg. The method was validated for the following organochlorine insecticides and organophosphorus pesticides:  aldrin, dichloran, dieldrin, p,p‘-DDE(TDE), p,p‘-DDD, p,p‘-DDT, α-endosulfan, β-endosulfan, endosulfan sulfate, diazinon, dichlorvos, ethion, malathion, methyl parathion, methyl pirimiphos, mevinphos E+Z, and parathion; and the following dichloroanilide fungicides:  iprodione, procymidone, and vinclozolin. The SFE procedure was quicker, more environmentally friendly, and more cost effective than the traditional solvent extraction methods. Keywords: Supercritical fluid extraction (SFE); residue analysis; organochlorine insecticides; organophosphorus pesticides; dichloroanilide fungicides; strawberries

Item Type:Article
Business groups:Biosecurity Queensland
Subjects:Plant culture > Fruit and fruit culture > Berries and small fruits
Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Pesticides
Deposited On:26 Jul 2021 23:47
Last Modified:03 Sep 2021 16:46

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