Content Determination of Baicalin in Compound Qincang Nasal Sprays by HPLC
OBJECTIVE: To establish a method for the content determination of baicalin in Compound qincang nasal sprays. METHODS: HPLC method was adopted. The determination was performed on Waters Symmetry C18(150 mm×4.6 mm,5 μrn) column with mobile phase consisted of methanol-water-phosphoric acid (47:53:0.2, V/V/V) at the flow rate of 1.0 ml/min. The detection wavelength was set at 280 nm and column temperature was 20 ℃. RESULTS: The linear range of baicalin was 6.2-310.0 μg/ml (r=0.999 3) with an average recovery of 98.72% (RSD=0.89% ,n=9). CONCLUSION: The method is simple, rapid, accurate and reproducible, and it is suitable for the content determination of baicalin in Compound qincang biyan sprays.