玉米须水提液喷雾干燥工艺优选

Optimization of Spray Drying Process of Stigma Maydis Water Extract

目的:优选玉米须水提液喷雾干燥工艺条件,为玉米须配方颗粒的制备提供参考。方法:在单因素试验基础上,以总黄酮、总多糖含量及出粉率、水分的综合评分为指标,通过正交试验考察进风温度、空气流量和进料量对玉米须水提液喷雾干燥工艺的影响。采用UV测定总黄酮和总多糖含量,检测波长分别为400,490 nm。结果:最佳喷雾干燥工艺条件为进风温度180℃,进料量20%,空气流量800 L·h-1。总黄酮、总多糖质量分数及水分、出粉率平均值分别为0.14%,2.71%,5.81%,91.33%。结论:优化的喷雾干燥工艺稳定可行,为玉米须配方颗粒的品种开发和工业化生产提供参考。

Objective： To optimize spray drying process of Stigma Maydis water extract and provide theory support for preparation of Stigma Maydis dispensing granules. Method： According to single factor tests, with composite score of contents of total flavonoids and total polysaccharides, moisture content, flour yield as index, influence of inlet air temperature, air flow and feed rate on spray drying process of Stigma Maydis water extract was investigated by orthogonal test. Contents of total flavonoids and total polysaccharides were determined by UV, detection wavelengths were 400 nm and 490 nm, respectively. Result： Optimum spray drying process was as follows： inlet air temperature of 180℃, air flow rate of 800 L·h^-1, inlet rate of 20%. Contents of total flavonoids and total polysaccharides, moisture content, flour yield were 0. 14% , 2.71% , 5.81% and 91.33%. Conclusion： This optimized process is rational and stable, it can provide experimental basis for industrial production and product development of Stigma Maydis dispensing granules.