Objective:To study SanHuang gel preparation and quality control.Method:Carbopol the matrix made as gel,and establish quality control methods,determined by HPLC gel content in rhubarb,detection at 365 nm and the stability test.Result:emodin sample volume 0.002 57-0.051 40 μg range,and peak area values showed a good linear relationship(r=0.999 5);chrysophanol sample volume in the range of 0.008 61-0.172 20 μg,and the peak area values showed a good linear relationship(r=0.999 5);emodin and chrysophanol plus th...