FOOD SCIENCE ›› 2019, Vol. 40 ›› Issue (10): 220-228.doi: 10.7506/spkx1002-6630-20180128-384

• Composition Analysis • Previous Articles     Next Articles

Analysis of Characteristic Aroma Constituents of Hawk Tea

ZHANG Lei1, WANG Jie2, LUO Liyong1,3, ZENG Liang1,3,*   

  1. 1. College of Food Science, Southwest University, Chongqing 400715, China; 2. Tea Research Institute of Chongqing Academy of Agricultural Sciences, Chongqing 402160, China; 3. Tea Research Institute, Southwest University, Chongqing 400715, China
  • Online:2019-05-25 Published:2019-05-31

Abstract: Hawk tea, a kind of herbal tea with a unique pungent aroma, is popular in the southwest of China for a long time. In order to identify the aroma characteristics of hawk tea, 17 samples of commercial hawk tea were analyzed using headspace solid phase micro-extraction coupled to gas chromatography-mass spectrometry (HS-SPME-GC-MS) in this study. Then the characteristic aroma components of hawk tea were identified based on odor activity values (OAVs) and a comparative quantitative analysis of the aroma components identified. For this purpose, principal component analysis (PCA) was also carried out. The results obtained were as follows: 1) 6 classes of volatiles were detected from hawk tea samples, namely 61 terpene olefins, 22 alcohols, 15 aldehydes, 10 ketones, 4 esters, and 5 other substances; with terpene olefins being predominant; 2) based on the results of PCA, 20 volatile compounds including alpha-copaene, alpha-santalol were selected as the main aroma constituents of hawk tea; and 3) according to OVAs and the comparative quantitative analysis, 38 volatile compounds such as lauraldehyde, beta-ionone and epiglobulol contributed greatly to the aroma characteristics of hawk tea. Overall, 12 volatile compounds including spathulenol, alpha- bourbonene, and calamenene were responsible for the pungent camphor-like aroma of hawk tea, 17 compounds including lauraldehyde, alpha-pinene, 3-carene and beta-ionone for the flowery, fruity and rosin-like aroma, and 9 compounds including alpha-tantalol, alpha-gurjunene and alpha-guaiene for the wood, sandalwood-like and herbal aroma.

Key words: hawk tea, headspace solid phase micro-extraction, gas chromatography-mass spectrometry, characteristic aroma components

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