The optimum extraction parameters of solvent extraction are obtained by orthogonal experiments, with 86t3 ,2.5hours and. , material to hexane 1: 5, the yield of garlic oil are 0.249 % .
1. Response surface methodology was used in studying the extraction of catechins by ethanol, the optimal process conditions: temperature was 90℃, time was 10min, ethanol-tea ratio was 20: l(mL:g), concentration of ethanol was 75% were obtained, and under this condition, the extraction efficiency was 24.79%.
1、设计响应曲面法(response surface methodology,RSM)系统研究乙醇浸提儿茶素的工艺条件,得到最佳工艺:温度90℃,时间10min,液料比20:1(mL:g),乙醇浓度75%。
The methods of purification are investigated too. Vapour phase oxidation purification in high temperature is applied for the first time and optimal processing temperature is gained from weight losses.
The optimum conditions of experiment and magnifying test were as followed:1. The optimum process of extractionFresh old age tea leaves were boiled to kill enzymes firstly.
1、 最 佳提取 工艺
2. The optimum process of purificationThe extraction solution was separated by membrane system.
2、 最 佳纯化 工艺
the optimum temperature of water bath is 60℃;
最 佳水浴 温度为60℃;
The optimum temperature is 38℃.
最 佳生长 温度为38℃;
the optimum calcination temperature was 750 ℃.
最 佳焙烧 温度为750℃。
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