Development of Sample Preparation for Determination of Organophosphorus Pesticides Residue in Crude Palm Oil Using Gas Chromatography Technique

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)

Corresponding author: E-mail: ppimpimo@yahoo.com