Ultrasound-assisted Extraction of Tea Polyphenols

Ultrasound-assisted Extraction of Tea

Tea polyphenols is a general term for polyphenols in tea, including flavanols, anthocyanins, flavonoids, flavonols and phenolic acids. Among them, flavanols (catechins) are the most important. Tea polyphenols, also known as tea tannins or tea tannins, are one of the main components that form the color and aroma of tea, and are also one of the main components that have health care functions in tea. Studies have shown that active substances such as tea polyphenols have detoxification and anti-radiation effects, can effectively prevent radioactive substances from invading the bone marrow, and can quickly excrete strontium 90 and cobalt 60 from the body.

Ultrasonic extraction is considered the wave of the future when it comes to the successful extraction of cannabinoids from hemp. The medicinal cannabis industry has started to turn to the advanced method as one of the best ways to obtain viable therapeutic compounds successfully from the cannabis plant fibers. It is a clean method that leaves no solvent residue.

Parameter

Ultrasonic extraction features

It is suitable for the extraction of active ingredients of Chinese herbal medicines. It is a new method and new process for Chinese medicine pharmaceuticals to completely change the traditional method of boiling and alcohol precipitation extraction. Compared with boiling and alcohol precipitation, ultrasonic extraction has the following outstanding features:

(1) No need for high temperature. Enhanced extraction with ultrasonic waves at a water temperature of 40°C-50°C, without boiling at high temperature, does not destroy some of the medicinal ingredients in Chinese medicinal materials that are thermally unstable, easily hydrolyzed or oxidized.

(2) Atmospheric pressure extraction, good safety, simple operation and convenient maintenance.

(3) High extraction efficiency. The best extraction rate can be obtained by ultrasonic enhanced extraction for 20 to 40 minutes

(4) with broad spectrum. Wide applicability, the vast majority of Chinese herbal medicines can be ultrasonically extracted.

(5) Ultrasonic extraction has little to do with the properties (such as polarity) of the solvent and the target extract.

(6) Reduce energy consumption. Because ultrasonic extraction does not require heating or low heating temperature, the extraction time is short, so the energy consumption is greatly reduced.

(7) The processing capacity of medicinal raw materials is large, which is doubled or several times higher, and the impurities are few, and the effective components are easy to separate and purify.