河套大黄中大黄降脂素的薄层扫描测定

Quantitative Determination of Rhapontin in Root of Rheum hotaoense by TLC-scanning

硅胶Ｇ薄层板，苯－乙酸乙酯－甲醇（５：３．５：１．５）为展开剂，ＣＳ－９２０型薄层扫描仪测定。实验结果，回收率１００．１２％，ＲＳＤ为３．０％

he contents of rhapomtin in the root of Rheum hotaoense were determined by CS-920 TLC-scanning of silicagel plate. A mixture of benzene-EtOAc-EtOH(5 : 3.5:1.5) was used as the deve loping solvent. Recovery was100.44%,RSD 3.0%。