ONLINE HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY SOLVENT EVAPORATION HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY CAPILLARY GAS-CHROMATOGRAPHY FLAMEIONIZATION DETECTION FOR THE ANALYSIS OF MINERAL-OIL POLYAROMATIC HYDROCARBONS IN FATTY FOODS

An automated on-line method is described that involves a first LC sepa ration on a large column, evaporation of a 6-ml fraction in an on-line solvent evaporator, a second LC separation using a different mobile p hase, fractionating the components of interest and transfer to GC thro ugh the in-line vaporiser/overflow interface. The method is designed f or the injection of a large amount of food extract (e.g. up to 200 mg of fat) and is applied to the analysis of mineral oil material in a li nseed oil.