碱法提取浓缩大米蛋白工艺条件的研究

Studies on the processing technology of rice protein con-centrate extracted by alkali.

大米蛋白中80％以上是碱溶性谷蛋白,采用碱法提取具有提取率高、成本低的优点。蛋白质的回收可采用等电点沉淀法,适于工业化生产。本实验研究得到碱法提取浓缩大米蛋白的最佳工艺条件为:NaOH浓度为0.09mol/L,提取时间为4h,提取温度为室温,固液比为1:7,可得到纯度为80.16%的浓缩大米蛋白。蛋白提取率为90.1％。

There are nearly 80 percent glutelin in rice protein, which are soluble in alkali. The results showed that the optimum conditions were as follows:0.09mol/L NaOH, extracting time was 4 hours.six times NaOH solvent at room temperature. The concentration of rice protein in the product is 80.16 percent, with the recovery rate 90.10 percent.