OPTIMIZATION OF EXTRACTION TECHNOLOGY FOR AUCUBIN FROM EUCOMMIA ULMOIDES LEAVES BY ORTHOGONAL TEST

The extraction technology of aucubin from Eucommia ulmoides leaf was studied.The optimum technology extracting aucubin from Eucommia ulmoides leaves was studied by single factor experiments and by orthogonal test.The optimum technological conditions was acetone concentration 50 %,extraction temperature 65 ℃,time 1 h,the ratio of solvent to material 1∶16,and extraction for twice in neutral conditions.The extraction ratio of aucubin and the yield of extract were 1.86 %,16.93 %,respectively,and the purity of aucubin was 11.0 % in the optimized conditions.