正交实验优化超声辅助法提取黑米素工艺

Orthogonal test optimization of black rice pigment extracted by ultrasonic assisted process

研究并优化超声辅助法提取黑米素的工艺。当超声频率为20 k Hz时,以黑米为实验原料,通过单因素实验研究料液比、浸取温度、pH值、溶液乙醇体积分数和超声功率对黑米素提取率的影响。通过正交实验得到:在超声频率为20 k Hz时,当料液比为1:25、浸取温度为50℃、溶液pH值为2、溶液乙醇体积分数为40%、超声功率为0.8 W/cm2时,黑米素提取率最高,为85.54%。

In this paper, the ultrasonic assisted extraction technology of black rice pigment was studied and optimized. On the premise of ultrasound of 20 k Hz, using black rice as test material, the impact on the extraction efficiency of black rice pigment, solid-liquid ratio, soak temperature, pH value, volume fraction of ethanol of solution and ultrasonic power was studied through single factor test. The conclusion is obtained by orthogonal experiment： On the premise of ultrasound of 20 k Hz, when solid-liquid ratio is 1：25, the soak temperature is 50 ℃, pH value of solution is 2, volume fraction of ethanol of solution is 40%, and ultrasonic power is 0.8 W/cm2, black rice pigment extraction efficiency is 85.54%, which is best.