I. Gonzalezmartin et al., CONTRIBUTION TO THE STUDY OF THE ORIGIN OF CO2 IN SPANISH SPARKLING WINES BY DETERMINATION OF THE C-13 C-12 ISOTOPE RATIO/, Journal of agricultural and food chemistry, 45(4), 1997, pp. 1149-1151
The C-13/C-12 isotope ratio was determined in sparkling wines, granvas
, and gassified wines of different Spanish commercial brands with a vi
ew to establishing the origin of the CO2 contained in them. This techn
ique permits a distinction between the CO2 originating from C-3 and C-
4 plants and that coming from industrial sources.