Primary Study on Collective Regulations of Catalpol in Different Parts of Rehmannia glutinosa Libosch

Objective To study the collective regulations of catalpol in different parts of Rehmannia glutinosa Libosch.Methods HPLC method was used the Mobile phase was cetonitrile-water(0.5∶99.5)and detection wavelength was 210 nm.Results The standard curve of catalpol was Y=347.93X + 10.138(r=(0.999 6))with the linear range of 0.322 4～2.901 6 μg,the average recovery was 96.21%(n=5).Conclusion The method is simple,sensitive and rapid,and collective regulations of catalpol in different parts of Rehmannia glutinosa Libosch are apparent.