Pure instant tea and preparation method thereof

Abstract

The invention provides a preparation method of pure instant tea. The prepared pure instant green tea / white tea can be completely dissolved in purified water with 85+ / -5 DEG C (hot dissolving type) and25+ / -5 DEG C (cold dissolving type) to form clear and transparent tea soup solution, cream down and secondary precipitation cannot be formed when tea soup solution is preserved at the temperature of4 DEG C, instant tea powder (or particles) is green and light green to yellow green or light yellow, the instant tea has normal fragrance and taste of green tea / white tea, the content of tea polyphenol is higher than or equal to 35%, (the content of polyphenol of the white tea is higher than or equal to 25%), caffeine is higher than or equal to 3%, theanine is higher than or equal to 2%, and tea polysaccharide is higher than or equal to 20%. The preparation method includes the steps: (1) supercritical fluid extraction; (2) composite extraction; (3) filtering; (4) centrifugation; (5) pressure reduction and concentration; (6) spray drying. The instant tea effectively retain flavor components of tea leaves, a prepared instant tea product is strong, mellow and normal in fragrance, cold dissolving performance of the instant tea is improved, the problems of cream down and secondary precipitation of low-temperature preservation are solved, the shortcomings of weak taste and deep color of theinstant tea product are effectively overcome, and the yield of the instant tea is improved.

Description

technical field

[0001] The present invention relates to the technical field of food processing, in particular to a kind of pure instant tea powder including but not limited to spring green tea / white tea and spring green tea / white tea and summer green tea / white tea or autumn green tea / white tea. It also relates to a preparation method of the instant green tea / white tea powder. Background technique

[0002] Instant tea is made of tea leaves or fresh tea leaves as the main raw material, which is extracted with water or compound solvents or squeezed with fresh tea leaves, and undergoes production processes such as filtration, concentration, and drying. Food additives can be added or not added during the production process. and food processing aids, made of tea products (solid instant tea). According to the tea raw materials used, pure instant tea products can be divided into: instant green tea, instant white tea, instant scented tea, and other instant teas. Among them, pure in...

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