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Development of a methodology using gas chromatography‐combustion‐isotope ratio mass spectrometry for the determination of the carbon isotope ratio of caffeine extracted from tea leaves (Camellia sinensis) |
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| Authors: | Chen Wu Keita Yamada Osamu Sumikawa Akiko Matsunaga Alexis Gilbert Naohiro Yoshida |
| Institution: | 1. Department of Environmental Chemistry and Engineering, Tokyo Institute of Technology, , Yokohama, Kanagawa, 226‐8503 Japan;2. National Institute of Vegetable and Tea Science, , Shizuoka, 428‐8501 Japan |
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