柑橘皮渣水溶性膳食纤维的柠檬酸提取工艺优化

Study on optimization of water-soluble dietary fiber extraction process from citrus residues with citric acid

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。

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;temperature72℃. 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.