Rapid Screening and Structural Characterization of Antioxidants from the Extract of Selaginella doederleinii Hieron with DPPH-UPLC-Q-TOF/MS Method

Table 1

Antioxidant activities of different fractions from Selaginella doederleinii in DPPH assay.

Samples	DPPH (IC50, μg·mL^−1)^a
Petroleum ether fraction	53.1 ± 0.8
Ethyl acetate fraction	12.5 ± 1.6
n-BuOH fraction	29.4 ± 1.1
Ascorbic acid^b	15.6 ± 1.2
Quercetin^b	4.7 ± 0.5
BHT^b	46.8 ± 0.3

^aEach value is mean ± SD ( = 3); ^bis used as control.