苗药夜关门不同部位中槲皮素的含量测定及HPLC指纹图谱

目的：建立高效液相色谱法测定并比较苗药夜关门不同部位（根、老枝、嫩枝、叶、种子）的槲皮素含量，并建立指纹图谱。方法采用HPLC法测定其槲皮素含量，建立药材指纹图谱共有模式。结果夜关门药材中不同部位中槲皮素的含量差别较大，槲皮素含量最高的是种子，其次是嫩枝、叶和老枝，根含量较低；HPLC指纹图谱相似度差异较大，药材相似度均＞0.95，不同部位相似度根、老枝、嫩枝均＜0.85，叶、种子均＜0.60。结论建议将其药用部位根、老枝、嫩枝、叶、种子分开使用，为提高临床疗效和合理开发利用夜关门药材资源提供科学依据。

Content comparison on quercetin from different parts and HPLC fingerprint of Lespedeza cuneata(Dum.Cours.)G.Don.

Objective To establish a HPLC method for the determination of quercetin from different parts of L. cuncata(Dum. Cours.)G.Don.,including roots,old branches,young shoots,leaves and seeds,and to build the fingerprints. Methods The HPLC method determination of quercetin and fingerpints were establised. Results The restults showed that there were great differences be?tween the quercetin contents from different parts,with the highest contents found in seeds,followed by young shoots,leaves,old branches,and roots. The similarities of HPLC fingerprints of the medicinal material were quite different from the parts of L. cuncata (Dum.Cours.)G.Don.. The similarities were all above 0.95 for L. cuncata(Dum.Cours.)G.Don. samples,roots,old branches and young shoots below 0.85,leaves and seeds similarities below 0.60. Conclusion It was concluded that different parts(such as roots, old branches,young shoots,leaves,seeds)of L. cuncata(Dum.Cours.)G.Don. should be divided in clinical and productive practice so as to supply the scientific basis for enhancing the curative effect and reasonable utilization of the resource of L. cuncata(Dum.Cours.)G. Don.