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OBJECTIVE: To establish a method for determination of 10 ingredients such as gentiopicroside, sweroside, and mangiferin in India swertia, and settle the index components and their limits.METHOD: By Welch materials AQ-C18 column, determination was conducted by the gradient elution with methanol and 0.4% formic acid as mobile phase, with column temperature 30 degrees C, flow rate at 1.0 mL x min(-1), and 254 nm as the detection wavelength. RESULT: The linear relatives of 10 ingredients were good. The method showed the high precision and good reproducibility, and recovery rates were between 97% and 103%. The ingredients of market com-modities varied greatly. CONCLUSION: This method is simple, sensitive, reproducible, and applicable to the determination of the main ingredients in India Swertia. Sweroside and mango glycosides were suggested as the index components for determination in Jia Di (Swertia chirayita), and their content limits are not less than 0.1%, 0.3%, respectively.

OBJECTIVE: To evaluate the medicinal reasonableness and resource utilization of Dida from different species.METHOD: With common characteristic absorption peaks of HPLC fingerprints and SPSS cluster, the composition similarity of Dida from different species was evaluated. RESULT: The composition similarity of HPLC fingerprints of 33 Dida samples from 15 species and 1 variety originated from Swertia, Halenia, Gentianopsis, Lomatogonium was difference. The original species can be clustered into four groups by the relative area of 10 common characteristic peaks of HPLC fingerprints. The compositions of four different genera are quite different. CONCLUSION: Because of containing iridoids, xanthones, and triterpenes which have liver protection and cholagogue functions, all of species from Swertia, Halenia, Gentianopsis and Lomatogonium in Gentianaceae are classified as Dida in Tibetan medicine. According to the composition difference among different species, the HPLC fingerprints established for Dida from different source are an effective means to identify nd control the quality of Dida.