关键词: 山楂, 水提取工艺, 黄酮含量, 紫外光谱, 理化性质, 抗氧化活性

Abstract: The process conditions of flavonoids extracted from hawthorn with water were discussed. The effects of extraction time，temperature，solid-liquid ratio and acidity on flavonoids extracted from hawthorn were investigated；the extracted flavonoids type was determined by chemical color reaction and UV spectroscopy；the physical and chemical properties were investigated. The results showed that the suitable process conditions of water extraction of hawthorn flavone were as follows：the extracting time of 2 h，the temperature of 50 ℃ ，the solid-liquid ratio of hawthorn with distilled water of 1∶30，the acidity of pH = 8，the yield of flavonoids was 4. 96% under these conditions. The types of flavonoids from hawthorn which determined by color reaction and UV spectrum were flavonols and simple flavonoids. Food additives and metal ions had certain influence on the flavonoids content and the antioxidant activity of flavonoids.

Key words: hawthorn, water extraction process, flavonoid content, ultraviolet spectrum, physicochemical properties, antioxidant activity