Box-Behnken Design-响应面法优化绿原酸转化为新绿原酸的工艺研究

摘要

利用Box-Behnken-响应面法优化绿原酸转化为新绿原酸的工艺条件.在单因素实验基础上,采用Box-Behnken Design实验设计,考察反应温度、反应时间及pH值对新绿原酸产率的影响,优化绿原酸转化为新绿原酸的工艺参数,得到模型预测公式.优化条件为:反应温度107℃,反应时间60 min,pH值为4.72时新绿原酸产率为64.20％,与模型预测值接近,方程拟合良好.采用优选工艺制备新绿原酸并精制纯化,分别运用HPLC、1H-NMR、13C-NMR、ESI-MS等方法对其进行含量测定和结构表征,结果表明纯化后纯度达98.78％,收率为87.37％.%Box-Behnken design-response surface methodology was used to optimize the transformation from chlorogenic acid to neochlorogenic acid.Based on single factor experiments,the experiment design were developed by box-benhnhen central composite design with causal factors of the reaction temperature,time and PH to neochlorogenic acid.The optimum transformation conditions were as follow:reaction temperature at 107℃,reaction time of 60 min,the PH of 4.72.Under the optimum extraction technology conditions,the productivity of neochlorogenic acid was 64.20％.Neochlorogenic acid was isolated and purified.The determination and characterization of neochlorogenic acid was detected by HPLC,1H-NMR,13C-NMR and ESI-MS.The results showed that the content of neochlorogenic acid reached to 98.78％ and the yield of 87.37％.