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目的:测定黄芩药材和不同厂家的黄芩饮片中黄芩素转化率,对黄芩饮片的炮制质量进行探讨。方法:采用HPLC测定黄芩药材和不同厂家的黄芩饮片中黄芩苷与黄芩素的含量,并测定其超声自身酶解后的黄芩素含量,计算各自的黄芩素转化率。结果:黄芩药材中黄芩素的转化率为81.1%,按药典方法炮制的黄芩饮片的黄芩素转化率为5.3%,不同厂家的黄芩饮片的黄芩素转化率依次为76.3%,73.0%,54.81%,52.7%,61.3%,71.5%。结论:市售黄芩饮片的炮制质量偏低。
OBJECTIVE: To determine the conversion of baicalein in Radix Scutellariae and Radix Scutellariae from different manufacturers, and discuss the processing quality of baicalin in Radix Scutellariae. Methods: The contents of baicalin and baicalein in Radix Scutellariae and Radix Scutellariae from different manufacturers were determined by HPLC, and the baicalein content was determined by their ultrasonic digestion. The conversion of baicalein was calculated. Results: The conversion rate of baicalein in Radix Scutellariae was 81.1%. The baicalein conversion rate of Radix Scutellariae prepared by pharmacopoeia was 5.3%. The baicalein conversion rates of Radix Scutellariae from different manufacturers were 76.3%, 73.0% and 54.81% , 52.7%, 61.3%, 71.5%. Conclusion: The quality of processed Scutellariae Pieces is low.