响应曲面法优化雪莲果果粉喷雾干燥工艺研究

目的]对雪莲果果粉喷雾干燥工艺进行优化。方法]选取料液固形物含量（A）、进料流量（B）、进风温度（C）3个影响雪莲果果粉喷雾干燥感官品质的主要因素进行3因素3水平响应面试验设计；建立雪莲果果粉喷雾干燥感官评定标准；通过DesignExpert软件对试验数据进行方差分析和回归分析，进而预测出最优的雪莲果果粉啧雾干燥工艺，对回归模型的精度及优化工艺的可行性进行验证，并对雪莲果果粉的理化指标和微生物指标进行检测。结果]利用DesignExpert软件进行二次多元回归拟合，得到雪莲果果粉喷雾干燥产品感官评分预测值（Y）对编码自变量A、B和C的二次多项回归方程为：Y=85．40＋2．75A-1．13B-3．13C-0．75AB-1．75AC-8．50BC-4．20A^2-4．45B^2-10．95C^2。利用DesignExpert得到优化的喷雾干燥工艺为：料液固形物含量37．27％，进料流量18．93ml／min，进风温度156．14℃。3次重复试验的最大相对误差为3．34％，证明应用响应曲面法得到的回归模型的精度较高，优化的雪莲果果粉喷雾干燥工艺是可行的．结论]该研究为雪莲果的深加工提供了参考依据。

Optimization of the Spray Drying Technique of Smallanthus sonchifolius Powder with Response Surface Methodology

Objective] The spray drying technology of Smallanthus sonchifolius powder was optimized through the experiment.Method] Three factors: the content of solid(A) in liquid,the flowing rate of feed(B) and the air temperature at inlet(C),affecting the sensory quality of spray dried Smallanthus sonchifolius powder was analyzed with the experimental design of response surface with 3 factors at 3 levels.The standard of the sensory evaluation of spray-dried powder was established and the optimal spray drying proces...