Publish Time: 2022-11-07 Origin: Site
Quercetin is widely distributed in the plant kingdom and has a variety of biological activities of flavonols. Next, let's take a look at the information about quercetin.
Here is the content list:
What is quercetin?
What does quercetin do?
Preparation methods
Quercetin is a pigment, quercetin is almost insoluble in water, but quercetin respects glacial acetic acid, the alkaline aqueous solution is yellow, and quercetin is more common in many vegetables, fruits, cereals, as well as wine and tea, has strong antioxidant properties, for health and treatment of a variety of diseases are very good.
1、Promote lung health
Now people's bad habits are prone to lung problems, quercetin effectively promotes lung health, quercetin into the human body can be converted into nutrients absorbed by the body, can effectively repair lung function, promote lung health, especially for emphysema has a very good effect, but also can play a cough and asthma role.
2、Anti-inflammatory
Quercetin can play an anti-inflammatory role, mainly because quercetin can play a role in reducing interleukin 6 and tumor necrosis factor-alpha, which can effectively play an anti-inflammatory, health-promoting role.
3、Allergy relief
If there is an allergic reaction can try quercetin, quercetin can play a role in relieving allergy symptoms, and the use of quercetin can effectively block the allergic elements to the body's reflexes, to avoid the discomfort caused by allergies.
4、Promote cardiovascular health
Quercetin can also increase the tension of capillaries, so that our capillaries are more elastic, to effectively avoid cerebrovascular rupture and other situations, and effectively promote cardiovascular health.
5、Anti-cancer
Quercetin has a strong antioxidant and anti-cancer effect, research shows that quercetin can effectively inhibit the growth of cancer cells, but also can induce cancer cell death, very helpful for cancer patients.
The preparation methods of quercetin include extraction and isolation, acid hydrolysis, and enzymatic conversion, among which enzymatic conversion is the most practical.
1. Natural extraction and separation
Since the content of quercetin in plants is only a few parts per thousand to a few parts per ten thousand, and the extraction and separation are difficult and costly, therefore, the direct extraction of quercetin from plants is not very practical in production. But in the analysis, identification of flavonoids, or preparation of analytical pure samples, use quercetin extraction and separation techniques.
2. Acid hydrolysis method
Rutinoside of quercetin is widely distributed in nature with high content, such as Sophora japonica rice contains up to 20% or more. Extraction of rutin from locust rice first, and then acid hydrolysis to produce quercetin, this method is feasible in production.
The extraction methods of rutin mainly include alkali extraction and acid precipitation method, organic solvent extraction method, and maceration method, among which the alkali extraction and acid precipitation method are the most practical. Select 0.05% NaOH solution boiled for 20min, filtered while hot, extracted 4 times by the same method to get the alkaline aqueous solution of rutin, add acid to make it precipitate, filtered and then add acid to make it hydrolyze and get water insoluble quercetin, filtered, washed and dried to get quercetin solid.
3. Enzyme conversion method
The enzymatic hydrolysis of rutin is used to prepare a large amount of quercetin monomer with less content in plants, which is simple and safe to operate, the whole process is economical and applicable, the yield is large and suitable for industrial production, and the product purity is >90%, which can meet the needs of food and clinical applications. Therefore, enzymatic conversion is undoubtedly a very promising preparation method.
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