Study On The Extraction Technology Of Pectin And Synephrine In Lemon Pomace

Lemon pomace as raw material,single factor and response surface test is used to determine pectin and synephrine from lemon pomace in extraction process parameters,the lemon pomace in the extraction of pectin and synephrine and from the lemon peel slag,while purified pectin and pectin substance and compare the characteristics of different sources,aimed at efficient use of lemon pomace technology to provide a theoretical reference for the actual production applications,the main results are as follows:Acid extract pectin,select hydrochloric acid as the extraction agent,pectin extract the best condition: liquid ratio 1:25,extraction temperature 80 ℃,pH 2.0,time 60 min.Under optimum conditions pectin yield was 7.89%,with a purity of70.06%;ultrasound-assisted enzymatic extraction of pectin,Pectin optimum extraction conditions: enzyme concentration of 0.125g/mL,hydrolysis pH 5.0,hydrolysis temperature 51 ℃,hydrolysis time 1.6h,under optimum conditions this the actual value 15.40%,pectin purity of 75.23%.The ethanol reflux extract synephrine,Synephrine extract optimum conditions:ethanol concentration was 80%,liquid ratio 1:20,extraction temperature 70 ℃,extraction time2.30 h.Under optimal conditions,synephrine yield of 7.10%.Pectin decoloring,active carbon decoloring the best process for 100 ml of pectin liquid : activated carbon dosage was 1.0g,temperature was 50℃,pH value of 5.0,the adsorption time of 30 min.Resin bleaching optimum conditions: flow rate225 mL / h,the column temperature was 55℃.TCA method can be taken to remove pectin in 59.8% of protein,pectin is removed by dialysis in 76.0% of soluble sugar,pectin is removed before the loss was 8.8%.The optimum technological conditions of extracting pectin by ultrasonic-assisted enzymatic extraction of pectin from lemon peel slag,pear peel slag,apple peel slag,orange peel slag,pectin yield was: orange peel slag 17.63%,pear peel slag12.49%,lemon peel slag 15.21%,apple peel slag 13.52%.And the resulting products are high ester pectin.The content of physicol-chemical properties with QB 2484-2000 and GB25533-2010 requirements.Acid and ultrasonic-assisted enzymatic extraction of pectin in a scanning electron microscope to observe the structure of the two pectin structure than those fluffy,butquite different microstructure pectin,lemon peel enzymatic extraction of pectin-like porous network,acid extraction by pectin was film.