Qingfei Tang is a traditional Chinese medicine preparation composed of winter mulberry leaves, loquat leaves, southern and northern sand ginseng, fatty cicadas, Zhejiang Fritillaria, bitter almonds, winter melon kernels, mulberry bark, ground bone bark, moss roots, white fescue roots, and other ingredients. It is suitable for treating pneumonia. Among them, Zhejiang Fritillaria is one of the main medicinal active ingredients. The content and relative proportion of Fritillaria A and Fritillaria B directly affect the quality of the sample, and their quality control is particularly important.

Shanghai Tongwei refers to relevant methods and adoptsHPLC-ELSDWe have established a detection method for the content of berberine A and berberine B in Qingfei Tang, providing an effective detection solution and necessary guarantee for the quality control of Qingfei Tang drugs.