Detection method of irradiated green tea using ESR

• MATSUURA Masaaki

  Hokkaido University of Education

• UKAI Mitsuko

  Hokkaido University of Education

Bibliographic Information

Other Title

• 照射緑茶の電子スピン共鳴法による検知
• ショウシャ リョクチャ ノ デンシ スピン キョウメイホウ ニ ヨル ケンチ

Abstract

With electron spin resonance (ESR) spectroscopy, we revealed various radicals in commercially available Japanese green tea before and after γ-irradiation. The representative ESR spectrum of green tea is composed of sextet centered at g=2.0, a singlet at the same g value and a singlet at g=4.0. The first signal is attributable to a signal with hyperfine interaction of the Mn₂₊. The second signal is due to an organic free radical. The third signal may originate from the Fe₃₊. Upon irradiation, a pair of signals was newly appeared at the symmetric positions on both sides of the organic free radical signal. According to the theory of radical production in irradiated solid, a linear relationship is expected between the radiation dose and the radical yield. We determined the unreported irradiation dose by the linear extrapolation.

Journal

• FOOD IRRADIATION, JAPAN

  FOOD IRRADIATION, JAPAN 41 (1-2), 14-17, 2006

  JAPANESE RESEARCH ASSOCIATION FOR FOOD IRRADIATION

Keywords

• Japanese Green Tea
• Radiation induced Radical
• Detection Method
• Electron Spin Resonance Spectroscopy
• Relaxation Behavior

Details

• CRID: 1390001204558928896
• NII Article ID: 10018358065
• NII Book ID: AN00117832
• DOI: 10.5986/jrafi.41.14
• ISSN: 18843611
• ISSN: 03871975
• NDL BIB ID: 8558780
• Web Site: https://agriknowledge.affrc.go.jp/RN/2010732349
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8558780
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed