大青叶和板蓝根药材及其制剂质量控制的研究

首次提出以2,4(1H,3H)喹唑二酮[2,4(1H,3H)quinazolinedione]作为马蓝、蓼蓝药材及其制剂的质量控制指标。此成分系最近发现的,含量稳定且有代表性,尤其适用于评价此类中药制剂的真伪优劣,为当前难以解决的感冒退热冲剂和板蓝根冲剂的质量监控提供了可靠的方法。特别要指出的是本文是在高效液相色谱法中采用变换检测波长和梯度洗脱的方法,一次进样即可完成三种化学性质不同组分的含量分析,缩短了分析时间,提高了分析效率。

STUDY OF QUALITY CONTROL ON HERBAL DRUGS AND PREPARATIONS OF DAQINGYE AND BANLANGEN

This paper first suggests that 2,4 (1H, 3H) quinazolinedione (QZL) may be used as a quality control standard for the Chinese herbal drugs Daqingye (Folium Strobilanthis et Polygoni) and Banlangen (Radix Strobilanthis) as well as its preparations. QZL was found for the first time from the above mentioned two Chinese herbal drugs which has a representative property. Its content is stable. This made it possible to solve the difficulty of quality control for the preparations "antipyretic and common cold granules" and "Banlangan granules" and provide a reliable assay method to evaluate the quality of the herbal preparations. By changing the wavelength and using gradient elution in HPLC, 3 constituents can be determined through one injection by the present method, thus the time of determination may be shortened and the efficiency of assay increased. The method showed good linearity (r=0. 99998, n=4) in the range of 0.2～3.2 μg/ml of QZL, the average recovery was above. 95% with RSD<1.5% (n=3).HPLC condition: Column: LiChrosorb RP 18; elution gradient: methanol from 35% to 90% in water solution; determination wavelength: 226 nm and 288 nm.