目的 優(yōu)化金銀花提取物的真空帶式干燥工藝。方法 以綠原酸提取率和提取物收率為考察指標(biāo),選用干燥溫度、履帶速度、進(jìn)料量為考察因素,采用L₉(3⁴)正交試驗(yàn)確定金銀花提取物最佳真空帶式干燥工藝參數(shù)。結(jié)果 最佳干燥工藝條件為:干燥溫度60 ℃,履帶速度為175 mm/min,進(jìn)料量為18 L/h。結(jié)論 本干燥工藝所得綠原酸的提取率高,提取物收率穩(wěn)定,適用于金銀花提取物大規(guī)模的真空干燥工藝使用。

Objective To optimize the vacuum belt drying process for Lonicerae Japonicae Flos extract using orthogonal test. Methods The contents of chlorogenic acid and extract yield were taken as indexes, as well as heating plate temperature, track speed, and feeding speed as factors, the best belt drying process of Lonicerae Japonicae Flos extract was optimized using L₉(3⁴) orthogonal test. Results The optimal vacuum belt drying process conditions were as follows: heating plate temperature of 60 ℃, track speed of 175 mm/min, and feeding speed of 18 L/h. Conclusion The chlorogenic acid content is high and the yield is stable, which is suitable for mass production of Lonicerae Japonicae Flos extract using vacuum belt drying process.