STUDY ON EXTRACTION AND PURIFICATION PROCESS OF POLYPHENOLS FROM APPLE

Study the extraction technological parameters with ethanol and the purification process by macroporous resin of apple polyphenols.The extraction condition was studied by mono-factor and orthogonal experiment.The characteristics and parameters of purification process were investigated by the static absorption and elution experiments.It determines the optimal extraction condition:the concentration of ethanol is 80 %,the temperature is 80 ℃,the ratio between apple pomace to extractant is 1:3(g/L),and the extraction time is 60 min.The concentration of 0.50 g/L-0.60 g/L,pH 5.0,absorption temperature 25 ℃,absorption time 2 h,and the elution temperature 30 ℃,the elution concentration 70 % were the optimal purification condition of XDA-7 resin.