Plant extracts of the extraction method and effect
Solvent extraction with solvent to extract effective components from the solid material, the solvent used must possess and extract the characteristics of the miscibility of the solute. After lutein eye complex crushing plant material, into a suitable container, add several times the amount of solvent, can use dipping, diacolation and decoction, reflux and continuous extraction on extraction.
In the process of the extraction process of solvent extraction, solvent concentration, solid-liquid ratio, extraction temperature, extraction time will directly affect the extraction yield of active ingredients. CristinaJuan and others by solvent extraction in the extraction of rice ochratoxin A, and liquid chromatography (HPLC) with fluorescence detection method determine the content of OTA, research shows that in the most appropriate material liquid ratio, extraction temperature and extraction time, extract the saw palmetto extract OTA content up to 4.17 ng/g. MonteD. Holt, such as solvent extraction method is used to extracted from raw and cooked wheat kind of alkyl resorcinol, experiments showed that the solvent extraction method can save time.
Strong vibration and ultrasonic extraction is produced using ultrasonic cavitation effect to accelerate the material of plant cells, release, diffusion and dissolves into the solvent, at the same time can keep the structure and biological activity of extracted substances do not change. Ultrasonic extraction principle mainly for physical process, is gradually be taken seriously in best green coffee bean extract recent years a new extraction method. For most of the components, the ultrasonic extraction method than the conventional solvent extraction can significantly shorten the extraction time, low solvent consumption, high leaching rate, thus has higher extraction efficiency.
In the process of ultrasonic extraction technology, the choice of solvent and concentration, solid-liquid ratio, extraction temperature, extraction time will directly affect the extraction yield. LingZhou and others using the ultrasonic extraction method to extract fructus schisandrae, the main influence factors of ultrasonic extraction yield are studied, the experimental study, the extraction yield as the temperature rises, as power increases. HongVanLe using ultrasonic extraction such as cherry of vitamin E and phenolic compounds, mainly compared the ultrasonic extraction and enzyme extraction in the extraction time, extraction yield differences, the experimental results show that ultrasonic extraction fenugreek saponins time than enzyme extraction 6 times shortened, ultrasonic extraction and enzyme extraction is the extraction yield of 2 ~ 3 times. Ai-guo zhong, etc by using the method of ultrasonic extraction of fresh bamboo leaves chlorophyll, using spectrophotometer to determine the content of chlorophyll extracted by quantitative. Results show that compared with the commonly used organic solvent extraction, ultrasonic wave extraction not only high extraction rate, high speed, high efficiency, and is extracted at room temperature, without heating, energy saving.