The 15 N/14 N 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 15 N/14 N in bulk wine, following dealcoholisation and dehydratation. The delta15N 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 delta15N of wine. Delta15N analysis of 170 wine samples from 17 Italian regions showed differences between red and white wines and between regions.
Stable nitrogen isotopic composition of wine: a preliminary investigation / M., Paolini; M., Valentinotti; L., Ziller; Pellati, Federica; F., Camin. - STAMPA. - 1:(2013), pp. 280-282. (Intervento presentato al convegno 3rd MS Food Day tenutosi a Trento nel 9-11 Ottobre 2013).
Stable nitrogen isotopic composition of wine: a preliminary investigation
PELLATI, Federica;
2013
Abstract
The 15 N/14 N 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 15 N/14 N in bulk wine, following dealcoholisation and dehydratation. The delta15N 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 delta15N of wine. Delta15N analysis of 170 wine samples from 17 Italian regions showed differences between red and white wines and between regions.
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