Effects of Vacuum Freezing Dry on the Aroma Quality of Oolong Tea

YE Nai-xing, YANG Ru- xing, YANG Guang, YANG Jiang-fan, LIANG Xiao-xia, ZHENG De-yong

Journal of Tea Science ›› 2006, Vol. 26 ›› Issue (3) : 181-185.

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Journal of Tea Science ›› 2006, Vol. 26 ›› Issue (3) : 181-185. DOI: 10.13305/j.cnki.jts.2006.03.005

Effects of Vacuum Freezing Dry on the Aroma Quality of Oolong Tea

  • YE Nai-xing1, 2, YANG Ru- xing3, YANG Guang1, 4, YANG Jiang-fan1, 2, LIANG Xiao-xia4, ZHENG De-yong1
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Abstract

The vacuum freezing dry technique was applied during the drying process of the faint-scent type oolong tea. Compared with the freezing tea and baked tea, the contents of linalool, aromadendrene, β-caryophyllene, isovaleric acid phenethyl ester, β-cadinene, nerolidol, farnesol and hexatriacontane were higher in the freezing-dry tea. The vacuum freezing-dry technique could help to preserve the properties of color, aroma, flavor of oolong tea efficiently so that the freezing-dry tea had a strong flower scent, and its mellow was full of flavor. Therefore, the freezing-dry tea abowed a better quality in general compared with freezing tea and baked tea and would have a good prospective in the market in addition to its long storage and convenience in transportation.

Key words

aroma / baked tea / freezing tea / freezing-dry tea / oolong tea / quality / vacuum freezing dry

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YE Nai-xing, YANG Ru- xing, YANG Guang, YANG Jiang-fan, LIANG Xiao-xia, ZHENG De-yong. Effects of Vacuum Freezing Dry on the Aroma Quality of Oolong Tea[J]. Journal of Tea Science. 2006, 26(3): 181-185 https://doi.org/10.13305/j.cnki.jts.2006.03.005

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