Development of Sample Preparation for Determination of Organophosphorus Pesticides Residue in Crude Palm Oil Using Gas Chromatography Technique
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Abstract
Organophosphorus pesticides (OPs) determination was accomplished using gas chromatograph equipped with nitrogen phosphorus detector. Crude palm oil was extracted with acetonitrile in an ultrasonic bath. A multi-cartridge system was developed in which, in a single step, performs the clean-up of the extractant from the oil. The extractant was loaded on to solid phase extraction column to which a Florisil cartridge and a C18 cartridge had been connected in series. The Ops pesticides residues were eluted with 15 ml of acetonitrile (saturated with hexane). The recovery of 5 Ops pesticides was in the range from 62.55 – 116.61% and the SD was in the range from 0.01 – 0.21.
Keywords: Organophosphorus pesticides (OPs), Crude palm oil, Solid phase extraction (SPE)
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