响应面法优化棉籽粕复合氨基酸螯合铁制备工艺

Optimization of compound amino acid in cottonseed meal chelated Iron (Ⅱ) preparation via response surface methodology

摘要: 采用响应面法优化棉籽粕复合氨基酸与氯化亚铁进行螯合反应的条件,制备复合氨基酸铁螯合物。以pH、复合氨基酸与氯化亚铁质量比、螯合温度为自变量,氨基酸铁螯合率为响应值,利用二次正交旋转组合实验和响应面分析法对制备条件进行优化。结果表明,最佳反应条件为:pH4.30、温度40℃、复合氨基酸∶氯化亚铁质量比3.3∶1(g∶g),在此条件下螯合率为73.76%,与模型的预测值74.06%接近。

Abstract: The optimal chelating conditions for compound amino acid in cottonseed meal and ferrous chloride were investigated by response surface methodology (RSM) . Quadratic orthogonal rotation combination design and response surface methodology were applied the chelated conditions by pH, temperatureand the mass ration of compound amino acid and ferrous chloride as independent variables, while taking the chelated percent as dependent variable in the experiment. The results showed that the optimal reaction conditions were pH 4.30, temperature 40℃, the mass ration of compound amino acid∶ferrous chloride 3.3∶1 (g∶g) . Under these conditions, chelating rate was 73.76%, closed to the predictive value of 74.06%.