Tea polyphenols are composed of flavanols, hydroxy-[4]-flavanols, anthocyanins, flavonoids, flavonols and phenolic acids.
Physical properties: 1 Appearance: brownish yellow, light yellow or yellowish green powder.
2 traits: soluble in water and ethanol, bitter taste.
Stability: Stable at pH 4-8. In case of strong alkali, strong acid, light, high heat and transition metal, it is easy to deteriorate. The high heat resistance temperature of zui is about 250 °C in one and a half hours, and it is easy to decompose under ferric ions.
Safety evaluation: non-toxic
In the separation of other impurities in tea polyphenols, it is necessary to use the screening and grading process. At this time, the vibration screening equipment is needed. The vibrating screening machine produced by our company has excellent performance, perfect combination of quality and after-sales.
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