大豆肽的硅藻土脱色工艺优化

Optimization of bleaching of soybean peptide by diatomite

采用硅藻土为脱色剂,探究pH、硅藻土添加量、温度和时间对大豆肽脱色效果的影响,通过正交试验优化脱色工艺条件。结果表明:大豆肽的硅藻土脱色最佳工艺条件为pH 5.0、硅藻土添加量15 g/L、温度50℃、时间50 min,在此条件下脱色率可达60.5%,蛋白质损耗率仅为4.2%,脱色后的大豆肽中蛋白质含量达到87.8%,颜色由灰黄色变为乳白色。

Using diatomite as bleaching agent,the effects of pH,dosage of diatomite,temperature and time on the bleaching of soybean peptide were determined and the bleaching conditions were optimized by orthogonal experiment.The results showed that the optimal bleaching conditions were obtained as follows:pH 5.0,dosage of diatomite 15 g/L,temperature 50℃and time 50 min.Under these conditions,the bleaching rate could reach 60.5%,the loss rate of protein was only 4.2%,the protein content of the bleached soybean peptide still reached 87.8%,and the color changed from gray-yellow to milk white.