关键词: 苦荞黄酮, 提取, 精制, 大孔树脂

Abstract: The quantitative and qualitative analyses of flavonids in tartary buckweat leaves, stems, seeds and crushed shell were carried out respectively. The leaves which contain the hightest flavonoids among the materials were selected to produce tartary buckweat flavonoids powder, and extraction and purification conditions of tartary buckwheat flavonoids were optimized respectively. The optimal extraction conditions are determined as follows: 60% ethanol at pH 8.15 as extraction solution, leaves to the extraction solution 1:20 (g/ml), extraction temperature 75 ℃ and time 180 minutes, and the optimal purification conditions are determined as follows: selecting DA-201 macroporous resin with the capacity of 5 ml/g for the purification, 60% ehtanol as elution solvent with the amount of 180 ml and elution flow rate 2 ml/min. By the processes, the contents of rutin and total flavonoids in tartary buchwheat falvonoids powder are 85.34% and 91.36%, respectively.

Key words: tartary buchwheat flavonoids, extraction, purification, macroporous resin