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Volatile Flavor Components of Buckwheat-Green Tea

메밀녹차의 향기성분

  • Choi, Sung-Hee (Department of Food Science and Nutrition, Dongeui University)
  • Published : 2007.08.30

Abstract

The volatile flavor components of buckwheat (Fagopyrum esculentum Moench)-green tea were analyzed and identified. To make tea having good flavor and functional property, parched buckwheat (50%) was mixed with green tea (50%). The extraction of volatile flavor compounds of buckwheat-green tea was accomplished by a simultaneous distillation and extraction method using a Likens and Nickerson's extraction apparatus. The concentrated extract was analyzed and identified by gas chromatography and GC-mass spectrometry. The main volatile flavor components of buckwheat-green tea were compounds that originated from parched buckwheat and the green tea. The former were 15 pyrazines having roasted and nutty aroma and methylbutanals and furfural having sweet-aroma. The latter were nerolidol, linalool, indole, ${\beta}-ionone$ and geraniol etc having flower-like odor in green tea.

생리활성을 갖는 것으로 알려진 메밀을 고소하게 볶은 시판 메밀차를 중급 정도의 녹차에 혼합하여 메밀녹차를 제조하고 기호도와 관련이 있는 향기 성분을 동시증류추출(SDE) 장치를 사용하여 분석하였다. 메밀차와 녹차를 1:1로 혼합한 메밀녹차의 향기성분으로 42종류를 동정하였다. 메밀녹차에는 메밀차의 향기성분 23종류와 녹차의 향기 성분 16종류 및 공통으로 포함된 3종류의 화합물들로 구성되어 있었다. 메밀녹차의 향기성분으로는 15종류의 pyrazine류를 동정하였다. 이는 메밀녹차의 향기 성분 중 약 32%를 차지하는 비율이었다. 메밀녹차의 향기 성분은 본래 녹차가 가지고 있는 향에 구수하고 달콤한 향을 띄는 볶음 메밀의 향기성분들이 부여되어 생성된 것으로 밝혀졌다. 본 연구에서 사용한 녹차는 중급 정도에 해당되는 덖음차로 고급녹차에 많았든 linalool이나 geraniol은 적은 함량 포함되어 있었으나 녹차향에 기여하는 꽃향기를 띄는 nerolidol의 함량은 많았으며 nonanal, 2-phenylethanol, cis-jasmone, indole 및 ${\beta}-ionone$ 등도 함유되어 있었다. 복은 향의 중요성분으로는 roasted flavor인 pyrazine류와 pyrrole류, 달콤한 향을 띄는 methylbutanal류와 furan류 등으로 밝혀졌다. 특히, pyrazine류는 종류도 많고 함량도 메밀차 전체 면적의 56%로서 녹차에 혼합되었을 때 메밀녹차의 고소한 향에 크게 기여하는 것으로 나타났다.

Keywords

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