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Measuring 14C Concentration in Wine to Monitor Global Distribution of 14C

  • Hirohisa Sakurai (a1), Saori Namai (a2), Emiko Inui (a3), Fuyuki Tokanai (a1), Kazuhiro Kato (a4), Yui Takahashi (a2), Taichi Sato (a2), Satoshi Kikuchi (a5), Yumi Arai (a1), Kimiaki Masuda (a6), Katsumasa Shibata (a2) and Yasunao Kuriyama (a7)...

Abstract

Using liquid scintillation counting (LSC) and accelerator mass spectrometry (AMS), radiocarbon concentrations were measured for wine from 8 wineries located in 7 countries in the Northern and Southern hemispheres. The 14C concentrations of ethanol and residual materials in the wine were correlated (correlation coefficient 0.82). The δ14C measurements of wine samples from the mid-latitudes in the Northern Hemisphere were approximately 1l% lower than the extrapolations from Schauinsland data, suggesting a local fossil fuel effect. δ14C measurements from the wine samples from the Southern Hemisphere were higher than those from the Northern Hemisphere. The offsets of the 4 wine δ14C measurements were significant, with values between approximately 8% and 15%. Because the harvest years of the mixed grapes were estimated to be 7–12 yr older than their vintage years, this leads to a caveat when determining the 14C concentrations of the year using the wine vintage.

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Corresponding author

2 Corresponding author. Email: sakurai@sci.kj.yamagata-u.ac.jp.

References

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