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柑橘皮渣水溶性膳食纤维的柠檬酸提取工艺优化.docx

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柑橘皮渣水溶性膳食纤维的柠檬酸提取工 柑橘皮渣水溶性膳食纤维的柠檬酸 提取工艺优化 彭 娅1,彭 荣1,殷钟意2,郑旭煦1,2,* (1.重庆工商大学环境与生物工程学院,重庆 400067; 2.重庆工商大学催化与功能有机分子重庆市重点实验,重庆 400067) 摘 要 :以柑橘皮渣为原料,水溶性膳食纤维得率为指标,在单因素实验基础上,采用Box-Behnken原理设计的响应面 法优化柠檬酸提取柑橘皮渣中水溶性膳食纤维的工艺。方差分析和交互作用分析表明,最佳提取工艺为柠檬酸质量 分数3.38%、料液比1∶24、振荡时间69min、加热温度72℃,在此工艺条件下水溶性膳食纤维得率为21.10%±0.16%,与模 型高度拟合,可用于实际预测。 关 键 词 :响应面法,柑橘皮渣,柠檬酸,水溶性膳食纤维 Study on optimization of water-soluble dietary fiber extraction process from citrus residues with citric acid PENG Ya1,PENG Rong1,YIN Zhong-yi2,ZHENG Xu-xu1,2,* (1.Environmental and Biological Engineering Institute of Chongqing Technology and Business University, Chongqing 400067,China; 2.Research Center of Medical Chemistry Chemical Biology of Chongqing Technology and Business University, Chongqing 400067,China) Abstract:Citrus residues was treated with citric acid to extract soluble dietary fiber(SDF) and the yield of soluble dietary fiber was used to be an indicator. On the basis of single -factor experiments,response surface analysis based on Box -Behnken experimental design were carried out to optimize the extraction process of soluble dietary fiber. As indicated by variance analysis and interaction analysis,the optimal extraction parameters were found as follows:mass fraction of citric acid 3.38% ;material-to-liquid 1∶24;oscillation time 69min;temperature 72℃. Under the optimized conditions,the actual yield of soluble dietary fiber was 21.10% ±0.16%. It could be well fitted with model and was reliable and applicable for actual prediction. Key words:response surface methodology;citrus residues;citric acid;soluble dietary fiber 中 图 分 类 号 :TS255.1 文 献 标 识 码 :B 文 章 编 号 :1002-0306(2015)02-0243-05 doi:10.13386/j.issn1002-0306.2015.02.044 柑橘是世界第一大水果,年产量高达1000万t。 作为柑橘加工的下脚料,柑橘皮渣占果实的40% ~ 60%[1],这些残渣含有大量的水分、营养物质和膳食 纤维,极易腐烂变质,造成严重的环境污染。因此,开 发利用柑橘皮渣的有用资源,对于提高柑橘产业的 附加值以及保护环境等都具有十分重要的意义。 膳食纤维(Dietary Fiber,DF)是指不被人体消化 吸收的多糖类碳水化合物与木质素的总称。根据其 溶解性可分为水不溶性膳食纤维(Insoluble Dietary Fiber,IDF)和水溶性膳食纤维(Soluble Dietary Fiber, SD
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