Aim To establish an RP-HPLC method for simultaneous determination of 2"-O-rhamnosyl vitexin and vitexin in Chinese hawthorn leaf and its extract. Methods Chromatography was carfled out on Kromasil C18 column (250 mm...Aim To establish an RP-HPLC method for simultaneous determination of 2"-O-rhamnosyl vitexin and vitexin in Chinese hawthorn leaf and its extract. Methods Chromatography was carfled out on Kromasil C18 column (250 mm × 4.6 mm, 5 μm), using THF-CH3CN-H2O-H3PO4 (30 : 5: 125 : 0. 1) as the mobile phase at a flow rate of 1.0 mL·min^-1. The UV detection wavelength was 270 nm. Results The linear range of 2"-O-rhamnosyl vitexin and vitexin were 0. 106 4 μg - 2. 1280 μg ( r =0. 999 1 ) and 0. 139 2μg - 2. 784 0 μg ( r =0. 999 3 ), respectively. The average recoveries of 2"-O-rhamnosyl vitexin and vitexin in Chinese hawthorn leaf were 99.2% ( RSD = 2.80%, n = 6) and 100.6% ( RSD = 2.84%, n = 6), respectively. Conclusion This method is reproducible, simple, precise, and rapid for simultaneous determination of 2"-O-rhamnosyl vitexin and vitexin in Chinese hawthorn leaf and its extract, thereby providinge the basis for quality specification of Chinese hawthorn leaf and its extract.展开更多
文摘Aim To establish an RP-HPLC method for simultaneous determination of 2"-O-rhamnosyl vitexin and vitexin in Chinese hawthorn leaf and its extract. Methods Chromatography was carfled out on Kromasil C18 column (250 mm × 4.6 mm, 5 μm), using THF-CH3CN-H2O-H3PO4 (30 : 5: 125 : 0. 1) as the mobile phase at a flow rate of 1.0 mL·min^-1. The UV detection wavelength was 270 nm. Results The linear range of 2"-O-rhamnosyl vitexin and vitexin were 0. 106 4 μg - 2. 1280 μg ( r =0. 999 1 ) and 0. 139 2μg - 2. 784 0 μg ( r =0. 999 3 ), respectively. The average recoveries of 2"-O-rhamnosyl vitexin and vitexin in Chinese hawthorn leaf were 99.2% ( RSD = 2.80%, n = 6) and 100.6% ( RSD = 2.84%, n = 6), respectively. Conclusion This method is reproducible, simple, precise, and rapid for simultaneous determination of 2"-O-rhamnosyl vitexin and vitexin in Chinese hawthorn leaf and its extract, thereby providinge the basis for quality specification of Chinese hawthorn leaf and its extract.