ABSTRACT
Biopharmaceutics classification system of Chinese materia medica (CMMBCS) emphasizes characteristic of the multi-component environment based on the drug solubility and permeability. In this study, the in situ closed-loop method combined with LC-MS technique was utilized to study the intestinal absorption and metabolism of Puerariae Lobatae Radix decoction (PLRD), providing selection basis for intestinal permeability components in CMMBCS. A total of 36 components were identified from PLRD. Among them, 17 components could be detected in the plasma sample, indicating that 17 components could be absorbed into blood, so these 17 components could be used as intestinal permeability evaluation components in CMMBCS. The other 19 components were not detected in the plasma sample, suggesting that they may not be absorbed or metabolized by the gut wall enzymes.