Kvantitativna analiza polifenola u nekim vrstama roda Teucrium L.

The research was conducted on the leaves and stems of the following species of the genus Teucrium: T. scordioides, T. fruticans and T. polium. Species of the genus Teucrium are widespread troughout the Mediterranean region and are used in folk medicine as antidiabetics, diuretics, diaphoretics, expectorants, cholagogues, spasmolytics and antiinflamatory drugs. The quantity of polyphenols was determined using spectrophotometric methods. The results were compared between different species, plant parts and, for T. polium, different collection sites. T. fruticans contained the highest quantity of flavonoids, 0.437% (0.347% in the leaves and 0.090% in the stems) and the lowest quantity of phenolic acids, 4.05% (2.67% in the leaves and 1.38% in the stems). T. polium (Korčula) contained the highest quantity of phenolic acids, 5.72% (3.67% in the leaves and 2.05% in the stems) and the lowest quantity of flavonoids, 0.150% (0.125% in the leaves and 0.025% in the stems). The content of flavonoids and phenolic acids was higher in the leaves than in the stems. T. scordioides contained the highest quantity of total polyphenols, 15.63% while T. polium (Lastovo) contained the lowest quantity, 10.71%. The quantity of tannins ranged from 1.00 to 4.02%. T. polium collected on Korčula contained higher quantity of phenolic acids, total polyphenols, polyphenols unadsorbed on hide powder and lower quantity of flavonoids and tannins than the same species collected on Lastovo