| 摘要 |
Disclosed is a method for extracting high-purity theanine from fresh tea leaves, and the present invention belongs to the technical field of chemistry of natural products. The method for extracting high-purity theanine includes: constant-temperature digestion, centrifugation, primary membrane concentration, solvent extraction, electrodialysis, membrane dialysis, secondary membrane concentration, vacuum concentration, ethanol extraction, crystallization and microwave drying. The method of the present invention replaces a traditional process which uses ion exchange adsorption. In the present method, an electrodialysis process is used, which reduces a large amount of reagents required by elution in a traditional process, and the operation equipment is also easily available; therefore, the operation is simple, the production cost is low and the method is eco-friendly. Experiments prove that the purity of the product obtained by the method of the present invention can reach 98% or more and the separation efficiency is high. |
