Plant Extraction Method and Technology
Due to the diversity of plant raw materials and the complexity of the extract components, the extraction methods involved are diverse. In summary, according to the order of formation and the universal degree of application, it can be divided into traditional plant extraction methods and modern plant extraction methods.
Traditional plant extraction method
The traditional extraction method refers to the general extraction method that appeared earlier, the technology is more mature, and has been widely used. Traditional extraction methods often do not require special equipment, so their applications are more common. Traditional extraction methods mainly include pressing method, extraction method, precipitation separation method, membrane separation method, distillation method, ion exchange method, evaporation and crystallization, etc.
Modern plant extraction methods
Modern extraction methods are extraction methods based on modern advanced instruments or newly developed. But whether it is the classic method or the modern method, they are both extraction technology and a unit operation in the extraction process.
Here we include a brief introduction to the basic operations and techniques of modern extraction methods for natural plant raw materials.
In recent years, the fast-developing extraction technologies include supercritical fluid extraction technology, ultrasonic extraction technology, wave-dissolving sample and microwave-assisted extraction technology, high-speed countercurrent chromatography technology, solid-phase extraction technology, solid-phase microextraction technology, enzymatic extraction and semi- Bionic extraction technology, liquid membrane extraction technology, fast solvent extraction technology, etc. Especially in order to solve the adverse effects of solvents in traditional analysis, solvent-free or solvent-less sample extraction methods have developed rapidly. .