Preparing method of oolong tea concentrated solution

Abstract

The invention relates to a preparing method of an oolong tea concentrated solution. The preparing method comprises the following steps that firstly, oolong tea leaves are subjected to first-stage charging and extracting; secondly, enzymolysis is carried out, wherein a tea leaf extract solution is subjected to enzymolysis treatment, and wall-breaking enzyme, tannase and protease are used as an enzyme preparation; thirdly, the oolong tea leaves are subjected to second-stage charging and extracting; fourthly, separating and filtering are carried out; fifthly, concentration is carried out, wherein a tea extract solution is concentrated; sixthly, a finished product is sterilized, and thus the finished oolong tea concentrated solution is obtained. According to the method, by means of the synthetic effect of wall-breaking enzyme, tannase and protease with the combination of the tea two-stage charging method, the product yield and production efficiency within the same time can be increased; meanwhile, the oolong tea concentrated solution prepared though the method has high amino acid content with partial ester catechins reserved, and is full in tea sense and mellow in taste, the fresh and mellow sense and the tea sense of oolong tea are intensified, much feature flavor of the oolong tea is reserved, the taste of the oolong tea concentrated solution is upgraded, and diversity of the oolong tea concentrated solution varieties is improved.

Description

technical field [0001] The invention belongs to the technical field of food processing, in particular to a preparation method of oolong tea concentrate. Background technique [0002] Oolong tea concentrate is concentrated from oolong tea extract. QB / T4068-2010 "Tea Concentrate for Food Industry" defines tea concentrate as the main raw material of tea or fresh tea leaves, which is extracted with water or squeezed with fresh tea leaves, and food additives and food can be added during the production process. Processing aids are liquid products that use physical methods to remove a certain proportion of water and are processed as raw and auxiliary materials for food and beverages. [0003] Tea drink is a green and healthy drink. The flavor of tea drink made from tea leaves is mainly derived from the three parts of tea feeling, base rhyme and head aroma provided by tea leaves after extraction. The tea drinks currently on the market Its flavor mostly has defects such as bitter a...

AI Technical Summary

Problems solved by technology

The tea concentrate that has not been treated with enzymatic hydrolysis technology has a bitter and astringent taste, which is difficult for consumers to accept; the existing tea concentrate that has been treated with enzymatic hydrolysis technology has less characteristic flavor substances of tea, weak tea taste and fullness, and insufficient aftertaste

[0006] At present, the tea concentrates on the market are mainly green tea concentrates, and the types of tea concentrates are relatively simple, while oolong tea is warm in nature but not cold, with a mellow taste, and because of its various outstanding physiological effects, such as lowering blood pressure, losing weight, and lowering blood sugar. and other health care functions are more and more favored by consumers. It can be seen that the oolong tea beverage market has great potential, and the existing tea concentrates can no longer fully meet people's needs. Variety, enrich the diversity of tea concentrate

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