Due to the fact that I have good results in determination 13C/12C of honey and honey protein, and O18 in wine water, I realize that I don’t have problem in instrument methodology, but in preparation, i.e. destilation of ethanol. Does anyone have the idea of preparing a representative sample of ethanol by distilling the wine, to obtain a good yield and not to change the isotopic composition of the sample? Thank...
It is therefore necessary a distillation column type cadiot :
RECUEIL INTERNATIONAL DES METHODES D’ANALYSES – OIV Détermination de la répartition du deutérium dans l’éthanol OIV-MA-AS311—05 : R2011 1 Méthode OIV-MA-AS311-05
best regards
Another solution by GC-C-IRMS:
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
Rapid Commun. Mass Spectrom. 2008; 22: 3111–3118
Isotope ratio mass spectrometry coupled to liquid and gas chromatography for wine ethanol characterization
A. I. Cabanero, J. L. Recio and M. Ruperez
Issam Moussa is correct. GC-C-IRMS, or its variant irm-GC/MS is by far the cleanest approach to this analysis. Fractionation is then tightly controlled by the dynamics in the SSL inlet, and is quite conservative sample-to-sample, provided the concentration of C injected on-column is on the same order of magnitude (not running, say, a 1% solution on up to 95% EtOH). Between-run RSD of on our system, for a variety of terpenes at least, is
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