Phytochemical Characterization, In Vitro Antioxidant Activity, and Quantitative Analysis by Micellar Electrokinetic Chromatography of Hawthorn (Crataegus pubescens) Fruit

Table 2

Antioxidant activity through the DPPH radical.

Sample	Concentration (µg/mL)	% inhibition DPPH	EC50 (µg/mL)	TEC50	AE
Extract tejocote fruits	300	20.5	1472.27	36	1.88 × 10^−5
	600	32.4
	900	41.6
	1200	49.1
	1500	50.3
	1800	51.5
Trolox	120	41.4	154.19	1.33	4.87 × 10^−3
	140	46.2
	160	51.1
	180	56.4
	200	62.5
Quercetin	20	14.8	55.48	14.03	1.28 × 10^−3
	40	38.7
	60	56.3
	80	74.8
	100	85.4

EC₅₀: amount of antioxidant necessary to decrease the initial DPPH concentration by 50%; TEC₅₀: time required to reach the steady state for EC₅₀; EA: antiradical efficiency, where AE = 1/EC₅₀·TEC₅₀. The results are shown as the mean ().