大乌泡叶中总黄酮含量测定

Determination of Flavonoids in Rubus multibracteatus Levl.et Vant.

目的为大乌泡资源的合理开发和利用提供试验依据。方法采用60%甲醇提取大乌泡叶总黄酮,分光光度法测定其含量;并通过稳定性、重复性、精密度和回收率试验检验了该方法的可靠性和重复性。结果标准液和供试液均在510nm处有最大吸收。重复性、精密度、加样回收率试验的RSD值分别为2.11%、0.97%、2.34%,含量测定结果表明大乌泡叶中总黄酮含量为3.8%。结论以60%甲醇提取、硝酸铝显色、510nm测定的分光光度法适用于大乌泡叶中总黄酮含量的测定。

Objective To supply scientific basis for the reasonable development and utilization of Rubus multibracteatus Levl. et Vant. resources. Method The total flavonoids was extracted from Rubus rnultibracteatus Levl. et Vant. with 60% methanol and its content was determined by spectrophotometry. The reliability and repeatability of the method were tested through stability, repeatability, accuracy and recovery experiments. Result Both standard and tested solutions had the maximum absorbance at 510 nm The RSD values of repeatability, accuracy and recovery experiments were 2.11%, 0.97% and 2.4% respectively. The results of content determination showed that the total flavonoids in Rubus multibracteatus Levi. et Vant. was 3.8%. Conclusion Extracted with 60% methanol, colored with aluminiumnitrate and determined by spectrophotometry at 510 nm were suitable for the determination of total flavonoids in Rubus multibracteatus Levl.et Vant..