化学吸附法脱除蓝莓汁中单宁的研究

Study on Removing Tannin in Blueberry Juice by Chemical Adsorption

摘要:

采用明胶和聚乙烯比咯烷酮(PVP)对蓝莓汁进行单宁的吸附研究。明胶吸附正交实验结果表明,明胶吸附单宁类多酚物质的最佳条件为:作用温度30℃,作用时间30 min,按10 mL/dL添加质量分数为1%明胶溶液。单宁的脱除率可达65.60%。PVP吸附正交实验结果表明:PVP吸附单宁类多酚物质的最佳条件为:作用温度30℃,作用时间25 min,添加量5 g/L。单宁的去除率可达74.48%。

Abstract:

In this study,the optimum conditions of gelatin and PVP to remove tannin in Blueberry juice were determined by orthogonal experiment.The optimum conditions for gelatin to adsorb tannin was listed as follows:adsorption temperature 30℃,adsorption time 30min,the dosage of 1%gelatin solution 10 mL/dL.The optimum conditions for PVP was as follows:adsorption temperature 30℃,adsorption time 25 min,thedosage of PVP 5 g/L.By employed those optimum conditions,the tannin removal rate achieved at 65.60%and 74.48%,respectively.