Journal of agriculture & life science (농업생명과학연구)

Institute of Agriculture & Life Science, Gyeongsang National University (경상대학교 농업생명과학연구원)
권호 표지

The Changes of Chemical Composition of Green Tea by Picking Periods

채취시기에 따른 녹차의 성분 변화

  • Yang, Jae-Kyung (Div. of Environmental Forest science, Gyeongsang National Univ.(Insti. of Agric. and Life Sci.)) ;
  • Kim, Jong-Cheol (Instituent of Hadong Green Tea) ;
  • Lee, Jong-Gug (Instituent of Hadong Green Tea) ;
  • Jo, Jong-Soo (Gyeongnam National University of Science and Technology. Department of Interior Materials Engineering)
  • 양재경 (경상대학교 환경산림과학부(농업생명과학연구원)) ;
  • 김종철 (하동녹차연구소) ;
  • 이종국 (하동녹차연구소) ;
  • 조종수 (경남과학기술대학교 인테리어재료공학과)
  • Received : 2012.01.09
  • Accepted : 2012.04.27
  • Published : 2012.04.30
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Abstract

This study was carried out to investigate the chemical composition and the inorganic constituents of the green tea at the 3 picking periods (Ujeon, Sejag, Jungjag) in Hadong. The results as follows ; The contents of chlorophyll, tannin, vitamin-c and total catechin were increased as picking periods increased but the contents of total nitrogen, total free amino acids, theanine and caffeine were decreased on the reverse. The inorganic constituents Mg, Ca and Mn were increased as picking periods getting late but the Na, K, B contents were decreased on the reverse. The contents of the total nitrogen, chlorophyll, total free amino acid, theanine, caffeine and total catechin and Na, Mg, Ca, B and Se were insignificant differences between Ujeon and Sejag.

본 연구는 하동지역의 녹차에 대해 근적외선 분광분석법(Near Infrared Spectroscopy, NIRS)을 이용하여 채취시기별 화학적 성분(총질소, 엽록소, 탄닌, 유리아미노산, 데아닌, 비타민 C, 카페인, 카테킨류, 총카테킨) 및 무기물 성분 변화에 대하여 분석하였다. 녹차의 화학적 성분 함량에 있어 엽록소, 탄닌, 비타민 C와 총카테킨 함량은 채취시기가 늦어질수록 증가한 반면, 총질소, 유리아미노산, 데아닌, 카페인 등은 대체로 감소하는 경향을 보였다. 무기물 함량은 채취시기가 늦어질수록 Mg, Ca, Mn은 증가하였으나 Na, K, B는 감소하였다. 또한 우전과 세작의 화학성분 중 총질소, 엽록소, 유리아미노산, 데아닌, 카페인, 총카테킨과 무기물 중 Na, Mg, Ca, B, Se 함량에 있어서는 차이를 나타내지 않았다.

Keywords

Acknowledgement

Supported by : 경남과학기술대학교

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