Optimization of Extraction Conditions for Determination of Tiliroside in Tilia L. Flowers Using an LC-ESI-MS/MS Method

Table 8

Total phenolic content (TPC), total flavonoid content (TFC), antioxidant activity by the DPPH˙ method, and free radical scavenging ability (ABTS⁺˙) in different extracts (70% ethanol with addition of 1% acetic acid) from Tilia L. flowers.

Sample	TPC (mg·GA·g^−1 of dry extract)	TFC (mg·Q·g^−1 of dry extract)	TEAC (mM·Trolox·g^−1 dry extract)	IC50 (mg·mg^−1·DPPH˙)
MACst-E70% + AA1%	239.09 ± 15.66	23.70 ± 0.89	1.06 ± 0.03	0.25 ± 0.01
ASE-E70% (80) + AA1%	296.96 ± 15.66	16.89 ± 0.86	1.54 ± 0.05	0.30 ± 0.02
UAE-E70% (80) + AA1%	238.69 ± 15.46	20.58 ± 0.08	1.54 ± 0.02	0.25 ± 0.01
UR-E70% + AA1%	181.39 ± 2.62	14.05 ± 0.71	1.17 ± 0.01	0.34 ± 0.01