超声波协同复合酶法提取桑黄多糖工艺优化

摘要

Extraction technology of polysaccharide from Inonotus sanghuang was optimized by ultrasonic-assisted enzymatic method and response surface analysis. Based on the results of single factor experiment, enzymolysis of I. sanghuang sporcarp was carried out with 2% of complex phosphoesterasum (ratio of cellulose, pectinase, protease of 2:1:1) at 50℃ under pH of 6.5 for 1 hour. Then optimization of extraction technology was implemented on ultrasonic power, ultrasound time and ratio of liquid and material. The response surface analysis demonstrated that polusaccharide yield topped 3.31% under condition as follows: ultrasonic power 360.6W, liquid/material ratio 32.5:1, ultrasound treatment time 32.7minutes, similar to theoretical value of 3.46%.%在单因素试验的基础上,通过Box-Benhnken组合设计和响应曲面分析法优化桑黄Inonotus sanghuang子实体中多糖的超声波协同复合酶法提取工艺条件.在前期预实验的基础上,采用纤维素酶、果胶酶和蛋白酶按2:1:1组成复合酶对桑黄子实体进行酶解处理,添加量为2%,温度50℃,pH 6.5,在水溶液中酶解1 h.然后对工艺中的超声波功率、超声时间、液料比进行优化.响应面分析结果表明,桑黄子实体中多糖的最佳提取条件为:超声功率360.6 W,液料比32.5:1,超声时间32.7 min,多糖得率可得3.31%,与理论值3.46%基本吻合.