摘要
Abstract
High-methoxyl pectins were produced from citrus peel waste by extracting with ion-exchange resins and purifying with macroporous adsorption resins. Through factor analysis method and orthogonal experimental, the optimal process conditions were showed as follows: ratio(solid： liquid)： 1 ： 20(m： V), ion exchange resins:4％, extracting solution pH: 1.7, extracting temperature 85℃, extracting time 140min, and the resulting extraction yield was 19. 806％. Then the using times of macroporous adsorption resin (AB-8 type) and different flow rates of constant flow pump were researched to find the best flow rate. When the best rate was 4 BV/h,the depigmentation rate was 54. 45％ and the purifying yield was 95.32％. So the final yield of citrus peel pectin, degree of methoxylation, Galactose-uronic acid, molecular weight, ash content, pH of 0. 1％ solution, moisture were 18. 88％, 53.75％, 75.26 ％, 62040,l. 2％, 3. 201, 8.56％, resepctively, all the parameters reached the Chinese standard.关键词
柑橘皮/果胶/离子交换树脂/AB-8型树脂/理化/性质Key words
orange peel/ pectin/ ion-exchange resin/ macroporous adsorption resin(AB-8 type)/ physico-chemical properties of pectin
