Lactones Newly Identified in the Volatiles of Pouchong-type Semi-fermented Tea
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Updated: Mar 19, 2026

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Y Nobumoto1, K Kubota1, A Kobayashi1
1a Laboratory of Food Chemistry, Ochanomizu University , 2-1-1 Ohtsuka, Bunkyo-ku , Tokyo 112 , Japan.
Abstract:
Repeated column chromatography enabled the lactone fraction to be separated from the volatile condensate of pouchong tea. In this fraction, several unidentified lactones were found, and their structures were elucidated mainly by GC-MS and GC-FTIR. 2-Hexen-4-olide, 5-octen-4-olide, 5-octanolide, 2-nonen-4-olide, 7-decen-4-olide, and 3,7-decadien-5-olide were finally identified by a comparison with respective standard compounds. These compounds seem to contribute to the characteristic pouchong tea aroma.
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