This test method describes a method for the determination of hydrocarbons (n-alkanes) in vegetable oils and fats using gas chromatography-mass 297 spectrometric (GCMS) detection. Vegetable oils may be contaminated by mineral fuel oils (dieseloil) due to the use of transport/storage facilities which are not strictly for transport/storage of food-grade, or due to other reason. The […]

The method involves the extraction of chlorpyrifos with hexane acetonitrile. Chlorpyrifos is preferentially partitioned into the polar acetonitrile layer while the bulk of the lipids remains solubilized in the non-polar hexane. The acetonitrile extract are subjected to clean-up procedure through a silicic acid column. The chlorpyrifos is analysed by gas chromatography equipped with an electron […]

This method is used to determine the concentration of 15 organochlorine pesticides in edible oil using capillary column with electron detector (ECD). Main Research: Halimah Muhamad

Deltamethrin is the common name for (S)-α- cyano-3-phenoxybenzyl(1R)-cis-3-(2,2- dibromovinyl)-2,2-dimethylcyclopropane carboxylate with the structure as in Figure 1. It is a colourless crystalline solid with a melting point of 98o C-100o C. The vapour pressure is 0.002 mPa at 25o C and it is almost insoluble in water with a solubility of 0.002 g litre-1 at […]

Acephate is the common name for O,S-dimethyl acetylphosphoramidothioate. It is a colourless solid with melting point of 82ºC-89ºC, vapour pressure of 0.226 mPa at 24ºC, density of 1.3 g litre-1 and with a solubility in water at room temperature is 650 g litre-1 Main Research: Yeoh Chee Beng