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Department of Food Engineering, Dankook UniversityAbstract To quantitatively evaluate the total phenolics, total flavonoids, and antioxidant capacity in the leaves, bulbs, androots of fresh Allium hookeri, they were extracted using various solvents including water, aqueous methanol (20, 40, 60,and 80%; v/v), and absolute methanol. The leaves had the highest levels of total phenolics (240.4-276.6 mg gallic acidequivalents/100 g) and total flavonoids (9.7-34.1 mg catechin equivalents/100 g). The highest antioxidant capacities of 78.7-103.4 mg vitamin C equivalents (VCE)/100 g, 24.4-59.0 mg VCE/100 g, and 1,798.8-2,169.7 mg VCE/100 g in the leaveswere also observed using 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), 2,2-diphenyl-1-picrylhydrazyl(DPPH), and oxygen radical absorbance capacity (ORAC) assays, respectively. The total phenolics had a higher linearcorrelation with antioxidant capacity than the total flavonoids. In general, 60% (v/v) aqueous methanol extract had higherlevels of total phenolics and flavonoids, and higher antioxidant capacity than any other solvents used. This study suggestedthat A. hookeri might be a good source of phenolics and antioxidants.Keywords: ABTS, DPPH, ORAC, solvent polarity, vitamin C equivalent antioxidant capacity

Total Phenolics, Total Flavonoids, and Antioxidant Capacity in the Leaves, Bulbs, and Roots of Allium hookeri