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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
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  • 1. Institute of Science,Technology and Economics of Tea Industry, 2. Department of Tea Science,Fujian Agriculture and Forestry University, Fuzhou 350002, China;
    3. Tea Research Institute, Fujian Academy of Agricultural Sciences, Fu`an 355015, China;
    4. Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China

Received date: 2005-12-19

  Revised date: 2006-07-12

  Online published: 2019-09-11

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.

Cite this article

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 . DOI: 10.13305/j.cnki.jts.2006.03.005

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