Active Components and Antioxidant Activities of Four Kinds Small Berry Juices

The main purpose of this paper was to evaluate the activities preliminarily of four kinds of small berry such as Rubus corchorifolius L. f., Vaccinium Spp., Sorbuspohuashanensis H and Lonicera edulis. The content of polyphenols, superoxide dismutase (SOD), anthocyanins and total flavonoids was determined in the four small berry juices, and their antioxidant activities in vitro were studied. The results showed that the contents of polyphenols (4.659 mg/mL), SOD (115.38 U/mL) and total flavonoids (10.717 mg/mL) in Lonicera edulis were 1.5~7 times higher than that of the other three small berries, the content of anthocyanin (3.768 mg/mL) was about 14 times higher than that of Sorbuspohuashanensis H. Using V_C as the positive control, the Lonicera edulis had the best antioxidation effect in vitro, and the IC₅₀values for the scavenging of·OH, DPPH·radicals and lipid peroxidation were 2.066 mg/mL, 61.342 μg/mL and 181.590 μg/mL respectively. There was no obvious advantage in the scavenging of O₂^-·free radical.The correlation analysis showed that the content of polyphenols, anthocyanins, SOD and total flavonoids in the four small berry juices and the clearance rate of·OH, O₂^-·, DPPH·radicals and the inhibition rate of lipid peroxidation were positively correlated with a significant correlation.The four kinds small berry juices all had good antioxidant activities in vitro, and the Lonicera edulis showed the best antioxidant activities.