以柑橘皮渣为原料,采用离子交换树脂提取法与大孔吸附树脂纯化法来制备高,酯果胶,通过单因素及正交试验确定果胶的最佳提取工艺为料液比1:20(m:V),离子交换树脂含量4%,pH 1.7,温度85℃,时间140 min,此时粗果胶提取率19.806%;在纯化工艺研究中,通过对AB-8树脂使用次数及不同恒流泵流速的研究,确定最佳流速4 BV/h,此时脱色率为54.45%,果胶纯化得率为95.32%.柑橘果胶实际得率为18.88%,酯化度为53.75%,半乳糖醛酸含量和分子量分别为75.26%和62 040,其他基本性质如灰分(1.20%)、0.1%溶液pH(3.201)、干燥失重(8.56%)等均达到国标要求,表明该方法适宜用于提取高酯果胶.%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.
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