Table 3. Flavonoid contents of 5 Tunisian plants extracts

Samples	Contents (mg/g)
	Caffeic acid (Rt1): 15.417 min)	Quercetin (Rt: 4.443 min)	Rutin (Rt: 2.094 min)
Ammophila arenaria Link	ND2)	8.12±0.01d	1.67±0.02
Cistus villosus L.	5.28±0.02b3)	8.25±0.01d	ND
Pistacia lentiscus L.	4.26±0.02a	8.29±0.06c	ND
Rosmarinus officinalis L.	10.62±0.68c	12.17±0.12b	ND
Thymus capitatus Hoffmanns. & Link	4.33±0.13c	12.70±0.20a	ND

Rt, retention time.
Non detected.
All values represent mean±SD (n=3). Values with different letters are significantly different by Duncan’s multiple range test (p<0.05).