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Biophenolic compounds constitute a complex mixture in olives and derived products. In this work, ion-spray tandem mass spectrometry coupled with liquid chromatography is applied to the identification and quantification of biophenols present in complex matrices such as olives and vegetation waters. The extraction and purification method for the biophenol present in both the matrices is reported. Using this approach the main biophenols found, in three different variety of olives, were: tyrosol, hydroxytyrosol, oleoside methyl ester, oleoside dimethyl ester, and oleuropein. In vegetation water the biophenols are present in lower amounts than in olives

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Glass capillary columns either with modified internal area or coated with a layer of liquid phase exhibit a very high resolution and may be used to separate isotopic molecules. Optimum working conditions have been established in terms of peak resolution and analysis time.The following systems have been studied by operating at temperatures up to 77°K.: CH4-CD4, CH-CDe, C2H4-C2D4, CtHs-CyDg, and 0216-0218. The gas chro-