RESUMEN
Objective: To establish a method of simultaneously determining gallic acid,5-HMF,catechin and paeonol in the different processing degrees of Moutan Cortex charcoal by HPLC,and to compare the difference. Methods: The HPLC separation was carried out on a UltimateTMXB-C18column( 250 mm × 4. 6 mm,5 µm) with a mobile phase of acetonitrile and water containing 0. 5% formic acid. The flow rate was 1. 0 m L / min at 30 â column temperature,and the detection wavelength was 245 nm. Results: The contents of gallic acid and 5-HMF were increased with the extension of processing time,but declined when it reached to a certain extent. And the contents of catechin and paeonol were decreased in the heating process. Conclusion: The differences of compounds content in different processing degree of Moutan Cortex charcoal were greatly. It provides a scientific basis for quality standard of Moutan Cortex charcoal.