Tea Polyphenols are Used as Preservatives and Antibacterial Agents
Eco-friendly Tea Polyphenols (GTP), also called antioxidants, Vidophenol, and Fangharin, certainly are a compound of polyhydroxy phenolic compounds in tea. It includes more than 30 phenolic substances. The constituents are catechins in addition to their derivatives, what exactly are primary chemical components with health-care functions in tea. Tea polyphenols have some physiological activities, for instance, anti-oxidation, anti-radiation, anti-aging, lowering bloodstream fat, lowering bloodstream sugar, inhibiting bacteria, and enzymes.
Chemical composition
Tea polyphenols will be the primary components that determine the color, aroma, taste, and effectiveness of tea, comprising 20% to 30% of the dry weight of tea. In line with the primary chemical components, tea polyphenols are split up into four groups: catechins, flavonoids, anthocyanins, and phenolic acids. Incorporated within this, catechins hold the finest content, comprising 60% to 80% of tea polyphenols. The catechins are generally epicatechin (EC), epicatechin gallate (ECG), epigallocatechin (EGC), and epigallocatechin gallate (EGCG). Incorporated within this, the initial two are classified as non-ester catechins, as well as the latter are classified as ester catechins. The finest content of catechins in teas are EGCG, adopted by ECG, and again EGC.
Physical and chemical characteristics
Pure tea polyphenols are white-colored-colored amorphous crystalline substances. Through the extraction process, due to the oxidation and polymerization of the small little bit of tea polyphenols, it'll appear light yellow to brown, getting a small tea aroma and astringent taste it's easily soluble in ethanol, methanol, and ethyl acetate. , Acetone, etc., slightly soluble in fats, insoluble in organic solvents, for instance, benzene and chloroform good heat resistance, hygroscopicity, stable at pH 2-7, easy to oxidize and polymerize under light or pH>8. It might produce eco-friendly and black compounds with iron ions.
