ANALYSIS OF WINE AROMA BY DIRECT-INJECTION IN GAS-CHROMATOGRAPHY WITHOUT PREVIOUS EXTRACTION

A method is proposed which allows the direct gas chromatographic analy sis of real-life samples of wine (i.e., without the need of preliminar y sample preparation) just by using a programmed temperature vaporizer injector operated in a modified solvent elimination made. The procedu re presented is ecologically beneficial as no solvent is required for its performance; it is not expensive since it does not demand a specia l methodology; and it might be used as a quick screening in several fi elds. A comparison of the proposed method with other isolation techniq ues (i.e., continuous liquid-liquid extraction and simultaneous distil lation-extraction) usually employed for the concentration of volatile components is also included.