【正文】
25℃, the flow rate at mL/min and the detection wavelength at 282nm. Because of plex position, concentration of sanguinarine was determined to reflect total alkaloids in Macleaya cordata. Regression equation is Y=+, correlation coefficient R2=, the process for extracting active ingredient from Macleaya cordata and Bidens bipinnata L with ethanol was studied. The extraction yield of sanguinarine was (V/V), the extraction temperature at 60℃, the ratio of solvent to material at 10, the extraction time for 3h. Comparison of different parts of raw material, experimental showed that the extraction yield of sanguinarine decreased in the order of the leaves, the stems and the roots. Finally, the process for extracting active ingredient from Macleaya cordata and Bidens bipinnata L with inner ebullition method was studied. Inner ebullition method included saturating process and depressing process. The optimum condition of ethanol extraction was that:the concentration of releasing solvent ethanol 90%(V/V), the saturating time for 20min, the volume of resolution of 50 mL, the extraction temperature at 50℃, the extraction pressure under70kPa, the extraction time for 30min. Using this technology, the extraction yield of sanguinarine was , experimental showed th