New technology of plant extracts extraction coumarin
accelerated solvent extraction method is developed in recent years, the new extraction technology. Functional ingredients extracted from herbs, accelerated solvent extraction is a kind of 'green' technology, high temperature ( Room temperature 200 ℃ high pressure (
using accelerated solvent extraction method from bergamot extract coumarin, only 5 min if you get different domain pavilion, domain if six coumarin materials such as kiosks, average recovery in 95. 1%, 104. 9%. Such as Wu Mou extract the active substances in the common cnidium fruit, on the basis of the experiment using the same extraction solvent ( 95% ethanol) And the same material liquid ratio ( 1) , the traditional solvent extraction in 60 ℃ cost 2 h got coumarin 23. 02 mg/g; The accelerated solvent extraction method under 122 ℃ coumarin 27 just need 5 min. 02 mg/g。 Accelerated solvent extraction method has been applied in food, pharmaceutical analysis, and other fields, has good prospects for development.
other extraction method dispersive liquid-liquid microextraction (
of course, the extraction of plant � � bean element compounds by impurities, the influence of many factors such as temperature, an extraction method has limitations, and a variety of methods can take people to repair short, more efficient to extract the target material, it will be a trend of extraction of natural active substances in the future. Ultrasound was used for the first time in a microwave extraction technology to extract NiuFen leaf phenolics, extraction time is greatly reduced, found that the extraction efficiency is greatly increased. Later, the team studied ionic liquid a ultrasonic microwave assisted extraction, the results of this method is higher than UMAE extraction yield, but compared with the traditional heating reflux extraction, 8% ~ 17% higher extraction yield, time from 5 h shortened to 30 s. Reported by supercritical fluid extraction, solvent extraction, ultrasonic extraction and supercritical fluid in a liquid-liquid extraction method to extract angelica dahurica four coumarin, experiment results show that supercritical fluid a liquid-liquid extraction selectivity and high separation efficiency, the concentration of coumarin from 0. 144% is far to 41. 68%. Extract the active substances in the wood DouYe, first compare the ionic liquids and microwave extraction respectively, heating extraction and ultrasonic extraction combined extraction, ionic liquid, a microwave assisted extraction to finish, in 25 min extraction efficiency for 11. 0% ~ 38. 9%.
1, spinning, this paper this net, does not mean this website agree with their views and responsible for its authenticity, textual research.
2, as this article involves the content of his works, copyright and other issues, please contact with this net in 30 days, we will deal with it accordingly in the first time!