Study On Extraction Low-methoxy Pectin From Premna Microphylla Turci

Pection as natural amylose with a high-molecular weight,is containd in cell walls of many high plant. Because of its good physiology function,pectin is widely used in industry such as food, medicine, cosmetic. In rencent years,the productin of pectin is in a great increase. in the world. But most consume in our country depend on importion. Premna microphylla Turci with a high content of pectin has manifold value.This test adopt the material from WuShan county,use technic of microwave and colophony to make sure the best technics parameter. The finished product answer for the national criterion.The best craft process of extration low-ester pectin from Premna microphylla Turci is: raw material-pretreatment—extract—wash and percolation-debase value of ester—de-color—precipitate—filtrate and dryness1. The mature degree has obvious influence to the pectin content. Though the experimentation,we can get the conclusion that mature material adoptd in the last April,is the best raw material whose content of pection. attain to 22.17%;2. There are obvous different efficency of settled and unsettled materials on extraction. This test use microwave processing to investigate the influence of power,action time,and weight of leaves. The best echnics parameter of destroying enzyme are:microwave power is 700W,action time is 150s,weight of leaves is 40g.This method can debase the energy of enzyme to 13.89%.3. This test adopt microwave and tradition acid method to extraction pection and research on influence of output,clotted value,content of galactose aldehyde aid and rate of solid to liquid. The best echnics parameter of extraction are:power is 700W,action time is 5.5min,pH1,rate of solid/liquid is 1:15,wash 3times and 100mL water every time.4. Most of the pection existed in the world are high-ester pection. Meterage the pectin content of Premna,and get the conclusion:the value of ester is 76.89%.The best echnics parameter of debasing value of ester are:pH11, temperature at25℃, action time is 60min;5. Colophony has a good effect on adsorption,it can adsorb mostly pigment in the liquid.We can get the conclusion by single and orthogonal experiment:pH4, temperature at 30℃,velocity is 2.4BV/h,volume is 6BV.This method can take off 87.88% of the pigment. 6. Adopting the method of ethanol deposit, investigae the influence of deposit time,volume of ethanol,and concentrated volume.on the efficiency of inspissation. The best echnics parameter of deposit are:time is 60min rate of liqud to ethanol is 1:1.2,the volume of before concentrate to after concentrate is 500: 15...