Gao Zhenpeng, Yu Zhifang, Yue Tianli, Quek Siew Young
College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, P.R. China.
College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, P.R. China.
J Sci Food Agric. 2017 Jun;97(8):2498-2507. doi: 10.1002/jsfa.8066. Epub 2016 Oct 28.
The separation of polyphenols from kiwifruit juice is essential for enhancing sensory properties and prevent the browning reaction in juice during processing and storage.
The present study investigated the dynamic adsorption and desorption of polyphenols in kiwifruit juice using AB-8 resin. The model obtained could be successfully applied to predict the experimental results of dynamic adsorption capacity (DAC) and dynamic desorption quantity (DDQ). The results showed that dynamic adsorption of polyphenols could be optimised in a juice concentration of 19 °Brix, with a feed flow-rate of 1.3 mL min and a feed volume of 7 bed volume (BV). The optimum conditions for dynamic desorption of polyphenols from the AB-8 resin were an ethanol concentration of 43% (v/v), an elute flow-rate of 2.2 mL min and an elute volume of 3 BV. The optimized DAC value was 3.16 g of polyphenols kg resin, whereas that for DDQ was 917.5 g kg , with both values being consistent with the predicted values generated by the regression models. The major polyphenols in the dynamic desorption solution consisted of seven compositions.
The present study could be scaled-up using a continuous column system for industrial application, thus contributing to the improved flavor and color of kiwifruit juice. © 2016 Society of Chemical Industry.
从猕猴桃汁中分离多酚对于改善感官特性以及防止果汁在加工和储存过程中的褐变反应至关重要。
本研究考察了AB-8树脂对猕猴桃汁中多酚的动态吸附和解吸。所获得的模型能够成功用于预测动态吸附容量（DAC）和动态解吸量（DDQ）的实验结果。结果表明，在果汁浓度为19°Brix、进料流速为1.3 mL/min以及进料体积为7床体积（BV）的条件下，多酚的动态吸附效果最佳。从AB-8树脂上动态解吸多酚的最佳条件为乙醇浓度43%（v/v）、洗脱流速2.2 mL/min以及洗脱体积3 BV。优化后的DAC值为3.16 g多酚/kg树脂，DDQ值为917.5 g/kg，这两个值均与回归模型生成的预测值一致。动态解吸溶液中的主要多酚由七种成分组成。
本研究可通过连续柱系统进行放大以用于工业应用，从而有助于改善猕猴桃汁的风味和色泽。© 2016化学工业协会。
