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SummarySorbent extraction technology was used to separate the volatile and non-volatile components of wine. The extracts were analyzed by capillary gas chromatography.

A.U. 5c C I I I I 350 450 550 650 (nrnl Figure 2 PA spectra of pure picramidopropyl silica (sample 11) and the same sorbent with adsorbed anthracene.sample (I). One can conclude that Sample I contains species absorbing in the 450-750 nm region and that the reaction of NH2silica with picryl chloride is less selective than the other procedures.The increased absorption around 500 nm may be caused by a charge-transfer band arrising, e.g., from interactions of unreacted NH2-groups with bonded picramide ligands; a red complex formed from N-propyl picramide and n-propylamine was studied by us in dichloromethane. This interaction influences separation in charge-transfer HPLC of polycondensed aromatic hydrocarbons [4]. Also anthracene adsorbed on picramidopropyl silica causes an increase of absorption near 480 nm as shown in Figure 2. The slight color change of the original Sample II after adsorption of anthracene is in accordance with relative weakness of the chargetransfer interaction observed during chromatographic separations of polycondensed aromatic hydrocarbons on picramidopropyl silica [4].

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