二次通用旋转设计优化紫玉米芯色素的提取工艺

以一种紫玉米芯为原料，在单因素试验的基础上，以得率为指标，采用四因素二次通用旋转设计方法，对影响紫玉米芯色素提取的工艺奢件进行了优化；结果表明：紫玉米芯色素的优化提取工艺条件为浸提温度40℃、液固比60：1、乙醇体积分数60％、粒径80目、提取时间为3h；在此工艺条件下紫玉米芯色素粗品得率为6．88％，其产品色价达到14。

Optimization of the Extraction Technique of Pigment from Purple Corn Cob by Quadratic General Rotary Design

Quadratic general rotary design of tetra-factor is employed to optimize the extraction of pigment from corn cob on the basis of mono-factor tests with a purple corn cob as raw materials in order to obtain good yield. The results showed that the yield of primary product of the purple corn cob reached availably 6.88% under the condition of 40 ℃ leaching temperature, 60：1 ratio of liquid-to-solid, 60% ethanol volume fraction, 80 mesh particle diameter, and 3 h extraction time. Furthermore, the color value reached 14.