Abstract
Correlations between total phenolic, flavonoid and condensed tannins content with three extraction type of five lamiaceae family which is used to cure dental affections in Morocco were studied. The total phenolic contents were determined using Folin–Ciocalteu colorimetric method, flavonoids using catechin standard, condensed tannins using Acidified Vanillin and anthocyanin using differential pH method. The highest total phenolic (345,20 ± 28,23 mg GAE/g d.e), total flavonoides (381,17 ± 14,11 mg CE/g d.e) and total condensed tannins (133,77 ± 8,38 mg CE/g d.e) was obtained from soxhlet extract of Origanum compactum Benth. (p < 0.0001), whereas, the highest total anthocyanin content (65.12 ± 13.53 mg EC-3-G/100g d.e) was obtained from decoction extraction of Lavandula multifida L. The correlation using Principal Component Analysis (PCA) between extraction type was very positive for infusion and soxhlet and between flavonoids and total phenols attesting that flavonoids constitute the majority of phenolic compounds.
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