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This paper analyzes the the concentrated tea 's aroma components . The main results are as follows : 1 . Carry out of different concentrations concentrate aroma change research . The results show that : the tea the total concentrate aroma and group scores tended to decrease with the increase of concentration , with growth concentrated time , the concentration increases, the gradual loss of aroma , alcohols, ketones , aldehydes , esters decreased mainly a fragrant substance decreasing , the aroma loss during processing , and therefore the production of concentrated liquid according to the requirements of different concentrations on the basis of certain concentration , it is necessary to maximize the retention of aroma , is to determine the quality of the concentrate the important factors. 2 different concentration process of the preliminary determination and analysis of tea aroma compounds and the total amount of the concentrated juice , results showed : reverse osmosis concentrated tea juice were 84 kinds of aroma components detected in 24 kinds of green tea concentrate aroma components , oolong tea concentrate detected in 57 kinds of aroma components ; detect 21 kinds of vacuum concentrated tea , black tea , green tea concentrate only detected eight kinds of aroma components , oolong tea concentrate 50 kinds of aroma components . This indicates that the process of reverse osmosis concentrate tea aroma significantly higher than concentrated by evaporation process tea aroma , better able to keep the tea aroma components . Of black tea, green tea , oolong tea, raw materials , and concentrate the measurement and analysis of the initial aroma component and total , tests showed that : tea concentrate through the enrichment process in the process , by the impact of temperature, pressure, number of factors , cause the tea concentrate aroma serious loss , the aroma greatly reduced , compared to the aroma the total and aroma components and raw materials has been a far cry from , does not have a unique flavor characteristics of the original tea .
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