Ultrasonic Assisted Extraction

Add an extraction solvent (water, ethanol or other organic solvent, etc.) The transducer vibrator is bonded to the outer wall or the vibrator is sealed in a stainless steel box and put into the container; when the ultrasonic generator is turned on, the vibrator emits ultrasonic waves into the extraction solvent, and the 'cavitation effect' and mechanical action produced by the ultrasonic wave in the extraction solvent can It can effectively break the cell wall of medicinal materials, so that the active ingredients are in a free state and dissolve into the extraction solvent.

On the other hand, it can accelerate the molecular movement of the extraction solvent, so that the extraction solvent and the active ingredients in the medicinal materials can quickly contact, melt and mix with each other. Ultrasonic Assisted Extraction (also known as extraction) is used by innovative people to extract the effective content of Chinese herbal medicines and various animals and plants due to its unique advantages of low extraction temperature, high extraction rate and short extraction time. It is an alternative to traditional shearing process methods. Modern high-tech means to achieve high-efficiency, energy-saving and environmentally friendly extraction

"Green" separation technologies have emerged as alternative methods for the organic solvent-based extraction due to their reduced need for solvents, and shorter time of process. Extraction methods involving ultrasound, microwave, enzymes, and supercritical CO2 are among these emergent separation technologies . Specifically, the ultrasound-assisted extraction can improve mass transfer, thereby shortening the time of extraction and reducing the consumption of solvents in comparison with conventional extraction methods .

The ultrasound-assisted extraction was confirmed to be a more efficient process than the conventional extraction, once it promoted a more effective extraction of phenolic compounds related to shorter period of time and lower volumes of solvent. Acidified water was an extracting solvent as efficient as ethanol on the extraction of phenolic compounds and anthocyanins from jussara fruits. The response surface methodology was successfully applied to optimize time, ethanol concentration and fruit:solvent ratio involved in the ultrasound-assisted extraction of phenolic compounds and anthocyanins from jussara fruits and blueberries. This study demonstrates that the ultrasound-assisted extraction process needs to be optimized by taking the specific characteristics of each food matrix into account. The dependence of the extraction process on the chemical composition and solubility of fruits deserve further research.