HPLC-DAD-ELSD Fingerprint of Radix Astragali in Longxi

Objective To establish the HPLC-DAD-ELSD fingerprint of Radix astragali,provide new methods for science quality control of the medicinal materials.Methods Application of HPLC-DAD-ELSD techniques were connected in series.The mobile phase A: 10% acetonitrile,B: 90% acetonitrile,detecting wavelength: 265 nm,flow rate: 1 mL/min,column temperature: 35 ℃,sample size: 20 μL,gain: 20,tube: 55 ℃,neb: 65%,air pressure: 2.068 5×105 Pa.The mutual mode was established depending on ten Astragalus samples from different growing areas in Gansu.The software Similarity Evaluation System for Chromatographic Fingerfrint of Chinese Materia Medica was applied to analyzing.ResultsThe established method is good for the separation of saponins,flavonoids from Radix Astragali,and simultaneous determination of the two different components in one sample injection.The similarity of different batches of medicinal materials is fit for the requirement.Conclusion The method is workable to simultaneously determine saponins and flavonoids fingerprint from Radix Astragali,and to control its quality.