Concentration of selected phenolics present in SWE (100°C, 18 min) extracts obtained from different amounts (s) of Mentha x rotundifolia (MR16)

s (g)Concentration (mg g–1 dry sample)
Luteolin 7-O-glucosideRosmarinic acidSalvianolic acid B
0.50.032 (0.003)*,b2.21 (0.06)a0.29 (0.03)a
1.00.051 (0.005)a3.8 (0.2)a0.33 (0.02)a
1.5-0.79 (0.06)b0.135 (0.004)b

Mean value and standard deviation in parentheses (n = 3); a,b different letters indicate significant (P < 0.05) differences for each compound among the experiments carried out with different sample amounts; -: none