RESUMO
Objective: To establish the fingerprint of Moutan Cortex by HPLC. Methods: The chromatographic fingerprint was obtained with Dikma Diamonsil C18 column (250 mm × 4.6 mm, 5 μm) and gradient eluted with acetonitrile and water (with 0.085% phosphoric acid). The column temperature was maintained at 35 °C, and the flow rate was 1 mL/min. The detection wavelength was 254 (0-21.5 min), 230 (21.5-45 min), and 254 nm (45-60 min). The injection volume was 20 μL. The peaks were identified by LC-MS/MS. Results: The method had good precision, stability, and repeatability. Eighteen chromatographic peaks among 20 common peaks were identified by LC-MS/MS. Ten batches of Moutan Cortex were determined, and the similarities were above 0.96.Conclusion: The study lays the foundation for the full quality evaluation of Moutan Cortex.
RESUMO
<p><b>OBJECTIVE</b>To establish HPLC fingerprints of Liuwei Dihuang condensed pills.</p><p><b>METHOD</b>Dikma Diamonsil C18 column (4.6 mm x 250 mm, 5 microm) was adopted, with acetonitrile (containing 0.05% phosphoric) -water (containing 0.05% phosphoric) as the mobile phase. The column temperature was set at 40 degrees C, and the flow rate was 1.0 mL x min(-1). The detection wavelength was 276 nm (0-10 min), 236 nm (10-40 min) and 276 nm (40-60 min). The sample size was 20 microL. Chromatographic peaks were identified by Q-TOF-MS-IDA-MS/MS method.</p><p><b>RESULT</b>Good precision, stability and repeatability were proved. Q-TOF-MS-IDA-MS/ MS method was adopted for qualitative determination of eighteen chromatographic peaks. Ten batches of Liuwei Dihuang condensed pills were determined with the method, and their similarities were above 0. 96.</p><p><b>CONCLUSION</b>The study lays a foundation for the overall quality evaluation of Liuwei Dihuang condensed pills.</p>