Determination of pyrethroid pesticide residues in rice by gas chromatography tandem mass spectrometry


ABSTRACT:

A simple and sensitive method for the determination of pyrethroid pesticide residues namely transfluthrin, allethrin, bifenthrin, lambda cyhalothrin, permethrin, cyfluthrin, cypermethrin, ethofenprox, fenvalerate, tauflivalinate & deltamethrin in rice grains by gas chromatography –tandem mass spectrometry (GC-MS/MS) was developed. The pyrethroid residues were extracted from homogenized rice samples initially with water followed by acetonitrile and cleaned up by using dispersive solid phase extraction which is based on QuEChERS (quick, easy, cheap, rugged and safe) method, finally the pyrethroid pesticide residues were separated by DB-5MS gas chromatography capillary column and quantified through tandem mass spectrometry (GC-MS/MS) with electron ionization source in Multiple reaction monitor mode (MRM) for quantification and confirmation. Recoveries were checked at two fortification levels 0.01 and 0.05mg/kg (n=6). The results showed that the mean recoveries for the fortified samples were ranged between 87-117% and %RSD in the range between 5.9 -19.8 for all compounds. Thus the developed analytical method was successfully used to analyze pyrethroid pesticide residues in routine rice samples.

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For more details PDF Link: http://www.jocpr.com/articles/determination-of-pyrethroid-pesticide-residues-in-rice-by-gas-chromatography-tandem-mass-spectrometry.pdf


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