Several studies have noted the high antioxidant activity of anthocyanins in blueberry fruits. However, there have been no studies on the structural form(glycosides or aglycones) of anthocyanins providing the highest antioxidant activity. In the present study, a combination of extraction(solid-liquid and liquid-liquid) and column chromatography was used for preparing blueberry anthocyanin glycosides and aglycones, and ultraviolet-visible(UV-vis) spectroscopy and high-performance liquid chromatography(HPLC) w...