The 15N/14N ratio has been measured in several foods to trace geographical origin and agricultural systems, but not yet in wine. In this work we developed a method for measuring 15N/14N in bulk wine, following dealcoholisation and dehydration. The δ15N of wine did not change after freeze-drying the sample or evaporating it under vacuum, obtaining adequate repeatability. The addition of nitrogen rich substances to must can affect the δ15N of wine. δ15N analysis of 170 wine samples from 17 Italian regions showed differences between red and white wines and between regions
Paolini, M.; Valentinotti, M.; Ziller, L.; Pellati, F.; Camin, F. (2013). Stable nitrogen isotopic composition of wine: a preliminary investigation. In: F. Biasioli (editor), 3rd MS Food day, October 9-11, 2013, Trento. San Michele all'Adige (TN): Fondazione Edmund Mach: 280-282 (P.91). ISBN: 9788878430358. handle: http://hdl.handle.net/10449/22791
Stable nitrogen isotopic composition of wine: a preliminary investigation
Paolini, Mauro;Valentinotti, Marta;Ziller, Luca;Camin, Federica
2013-01-01
Abstract
The 15N/14N ratio has been measured in several foods to trace geographical origin and agricultural systems, but not yet in wine. In this work we developed a method for measuring 15N/14N in bulk wine, following dealcoholisation and dehydration. The δ15N of wine did not change after freeze-drying the sample or evaporating it under vacuum, obtaining adequate repeatability. The addition of nitrogen rich substances to must can affect the δ15N of wine. δ15N analysis of 170 wine samples from 17 Italian regions showed differences between red and white wines and between regions
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