Culinary science and hospitality research (한국조리학회지)

Culinary Society of Korean Academy (한국조리학회)
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The Change of Catechin and Theanine Content in Green Tea during Different Storage Conditions

저장조건에 따른 녹차의 카테킨류, 테아닌의 변화

  • Received : 2016.06.30
  • Accepted : 2016.08.11
  • Published : 2016.08.31
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Abstract

This study used HPLC to analyze the contents of catechins, alkaloids, and theanine of commercial green tea. Green tea samples were stored for 6 months at five different temperatures, $30^{\circ}C$, $15^{\circ}C$, $4^{\circ}C$, $-15^{\circ}C$ and $-40^{\circ}C$. Catechins change in storage temperature was $30^{\circ}C$ > $15^{\circ}C$ > $4^{\circ}C$ > $-15^{\circ}C$ > $-40^{\circ}C$ stored for 6 months. Total alkaloids content higher levels were CAF(27.49 mg/g) with lower level of TB(2.16 mg/g) and TP(0.28 mg/g). The total alkaloids content decreased in the longer storage periods, a similar case with, although CAF were almost unchanged in all storage temperatures. The results indicate that temperature and storage time are important in the storage of green tea, with refrigerated and frozen conditions as preferable to increase or preserve the chemical compounds of the green tea.

본 연구는 시판 녹차를 5가지 저장 온도($30^{\circ}C$, $15^{\circ}C$, $4^{\circ}C$, $-15^{\circ}C$, $-40^{\circ}C$)에서 6개월간 저장하면서 카테킨류, 알칼로이드류 및 테아닌의 함량에 대하여 HPLC를 이용하여 분석하였다. 저장 온도에 따른 카테킨류의 변화는 저장 기간 6개월의 녹차를 비교하였을 때 $30^{\circ}C$ > $15^{\circ}C$ > $4^{\circ}C$ > $-15^{\circ}C$ > $-40^{\circ}C$의 순서였다. 총 알칼로이드류 함량은 저장기간이 길어질수록 총량은 감소하여, TB와 TP는 저장 온도 $30^{\circ}C$에서는 감소의 폭이 많았으나, $-15^{\circ}C$, $-40^{\circ}C$에서는 변화가 적었다. 테아닌의 함량은 $30^{\circ}C$에서보다 $4^{\circ}C$ 이하에서 저장할 때 더 높았다. 이러한 결과는 저장 온도와 저장기간이 녹차의 품질에 매우 중요하며, 냉장이나 냉동 상태로 저장하는 것이 녹차의 품질 유지에 도움이 될 것이다.

Keywords

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