Green tea extract as well as preparation method and application thereof

Abstract

The invention provides a green tea extract as well as a preparation method and application of the green tea extract. The green tea extract is prepared by combining ultrasonic extraction with an elution separation method by adopting macroporous resin. The preparation method comprises the following steps of preparing green tea leaves, carrying out ultrasonic extraction, elution separation by adopting macroporous resin, concentrating and obtaining the extract. After the green tea extract is added into tobacco shreds of cigarettes, the aroma quality of the cigarettes is promoted, the aroma of the cigarettes is pure, mild and fine, and the smoothness of smoke and the aftertaste are obviously improved. Compared with the traditional extracting method, green tea is extracted ultrasonically by using a mixed solvent, so that the use amount of alcohol is greatly reduced, the heating time is reduced, and the extraction rate is obviously improved; by combining with the elution separation by adopting macroporous resin, the content of components in the extract, which have negative influences on smoke of cigarettes, is reduced and the quality and purity of the active ingredients are improved. The preparation method has the advantages that the equipment is easy to operate, no pollution is caused, an improved extraction method with good effect is provided for preparing the green tea extract, and particularly can be favorably applied to tobacco production industry.

Description

technical field [0001] The invention belongs to the field of spices for tobacco and relates to the extraction and application of tea leaves in natural spices, in particular to a green tea extract and its preparation method and application. technical background [0002] China is the hometown of tea. The efficacy of tea is determined by its own specific chemical composition. Eliminate excess free radicals in the human body, remove fat and lose weight, lower blood sugar, blood fat and cholesterol, prevent cardiovascular diseases, inhibit tumors and other pharmacological functions, and have important applications in food processing, medicine, daily chemical and other fields. [0003] As one of the main teas in China, green tea ranks first among the six primary teas in the country. Green tea is made without fermentation, so it retains more natural substances of fresh leaves, and contains more nutrients such as tea polyphenols, catechins, chlorophyll, caffeine, amino acids, and v...

AI Technical Summary

Problems solved by technology

At present, the continuous extraction method of low-concentration ethanol is mostly used in China to prepare green tea extract, but this method has two major disadvantages: 1. The extraction time is long, the yield is low, and it is accompanied by the loss of part of the natural tea aroma; 2. In the green tea extract In addition to aroma components, it also contains some protein, impurities and other components, which restricts the application of the product. Therefore, how to extract the effective aroma components in green tea and separate and remove the impurities has become the development trend of tea flavors.