紫荆花总黄酮的分离纯化与光谱分析

目的:从紫荆花中分离、纯化总黄酮,对其黄酮成分及含量进行光谱分析。方法:以55%乙醇于100℃水浴回流提取紫荆花中的总黄酮,用聚酰胺树脂柱层析进行分离纯化,以芦丁、槲皮素、山柰酚为对照品,在200~600nm波长范围内进行紫外-可见吸收光谱扫描及含量测定,用KB r压片法在400~4000 cm-1范围内进行红外光谱扫描。结果:粗黄酮平均得率为7.32%,纯化后的生药中总黄酮得率为2.20%;紫外-可见吸收及红外扫描光谱结果显示,紫荆花总黄酮纯品中含有芦丁、槲皮素、山柰酚3种黄酮甙元,含量分别为0.8271、0.2169、0.3007 mg/ml。结论:经聚酰胺树脂柱层析纯化的紫荆花黄酮纯品中的总黄酮甙含量为24.30%。总黄酮含量为0.5346%。

Separation, Purification and Spectrum Analysis of Total Flavonoids from Cercis chinensis

OBJECTIVE: To separate, purify total flavonoids from Cercis chinensis Bge and analyze their flavonoid aglycones and content by spectrum method. METHODS: The total flavonoids from Cercis chinensis Bge were extracted by 15 volume of 55% ethyl alcohol and hot water refluence at 100 degrees C and separated, purified by polyamide resin chromatography. Based on reference substances of rutin, quercetin, kaempferol, it was analyzed and detected by UV-Vis spectroscope at 200-600 nm and by KBr infrared spectroscope at 400-4000 cm(-1). RESULTS: Average extraction rate of crude total flavonoids was 7.32% , and extraction rate of purified total flavonoids was 2.20%. The results of UV-Vis and IR scanning spectrum showed that purified total flavonoids from Cercis chinensis Bge contained of 3 kinds of flavonoid aglycones of rutin, quercetin, kaempferol, and their content was 0.8271, 0.2169, 0.3007 mg/ml respectively. CONCLUSION: Content of total flavonoid aglycones in purified flavonoids of Cercis chinensis Bge was 24.30%, and content of total flavonoid was 0.5346%.