肾茶水提物喷雾干燥工艺优化考察

Optimize the Spray-Drying Process for Preparing Aqueous Extracts of Orthosiphon Stamineus

目的优化肾茶喷雾干燥工艺。方法采用正交实验法,以迷迭香酸转移率、成品含水量及收率为指标考察浸膏相对密度、进风口温度及进料速度等因素对肾茶水提物喷雾干燥工艺的影响。结果最佳喷雾干燥工艺为进风口温度120℃,浸膏相对密度1.04,进样速度5 r·min-1。结论通过上述工艺对肾茶水提物喷雾干燥取得较为满意结果,可为肾茶提取物生产提供技术参考。

Objective To optimize the spray-drying process for preparing aqueous extracts of orthosiphon stamineus . Methods The orthogonal method was adopted to investigate three factors including relative density of the extract, inlet temperature and loading speed regarding the shift rate of rosmarinic acid, the moisture and the yield coefficient as indexes on the process. Results The optimized technological parameters were that setting inlet temperature at 120 ~C, taking the extract at relative density of 1.04 g. mL^-1 ,fixing the injection speed at 5 r .min^-1. Conclusion The process is scientific and valid, and the product obtained in this way is stable. Therefore, it can provide scientific basis for commercial process.