Antioxidant Activity of Water-Soluble and Alcohol-Soluble Flavonoids from Fengtou Ginger Rhizomes

doi:10.7506/spkx1002-6630-201719022

Abstract

Abstract: The antioxidant activity, in terms of scavenging capacity against 1,1-diphenyl-2-picrylhydrazyl radical (DPPH), 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) cation radical (ABTS+·) and superoxide anion radical and total antioxidant capacity (TAC, as measured by the ferric-reducing antioxidant power (FRAP) method) of alcohol-soluble and water-soluble flavonoids from Fengtou ginger rhizomes was determined and compared with that of VC and butylated hydroxytoluene (BHT). The results showed that the DPPH radical scavenging activity of the water-soluble flavonoids was better than that of BHT and the alcohol-soluble flavonoids, but weaker than that of VC, and the half maximal inhibitory concentrations (IC50) of the water-soluble and alcohol-soluble flavonoids were 585.75 and 1 013.45 μg/mL, respectively. In terms of ABTS+· and superoxide anion radical scavenging activity and TAC, the antioxidant effect of the alcohol-soluble flavonoids was better than that of VC, BHT and the water-soluble flavonoids. The IC50 values of the water-soluble and alcohol-soluble flavonoids for scavenging ABTS+· were 87.54 and 21.90 μg/mL, respectively, and the IC50 values for scavenging superoxide anion radical were 26.56 and 22.29 μg/mL, respectively. In the FRAP assay, the Trolox equivalent antioxidant capacity (TEAC1 000) of the water-soluble and alcohol-soluble flavonoids were 45.78 and 36.42 μg/mL, respectively. Overall, the antioxidant capacity of the flavonoids from Fengtou ginger rhizomes had different antioxidant activities in different model systems.

Key words: Fengtou ginger rhizomes, water-soluble flavonoids, alcohol-soluble flavonoids, antioxidation

CLC Number:

TS255.36

LI Wei, CHENG Chao, MO Kaiju. Antioxidant Activity of Water-Soluble and Alcohol-Soluble Flavonoids from Fengtou Ginger Rhizomes[J]. FOOD SCIENCE, 2017, 38(19): 137-142.

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Antioxidant Activity of Water-Soluble and Alcohol-Soluble Flavonoids from Fengtou Ginger Rhizomes

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