food authentication;
stable isotope ratio methods in food;
carbon dioxide;
ethanol;
delta C-13;
GC-C-IRMS;
IRMS;
sparkling wine;
beer;
carbonated water;
carbonated drinks;
multi isotopic analysis;
H-2-SNIF-NMR;
D O I:
10.1016/j.foodres.2006.10.001
中图分类号:
TS2 [食品工业];
学科分类号:
0832 ;
摘要:
We applied direct injections of headspace gas into a Gas Chromatography - Combustion - Isotope Ratio Mass Spectrometry (GC-C-IRMS) system to measure C-13/C-12 isotopic ratio of carbon dioxide from the headspace of several sparkling and soft-drinks. This straightforward technique, which consists in an automated analysis of the headspace sample with no prior purification steps, improves the determination of delta C-13 values of CO2 gas as a food probe authenticity. However, for an ultimate test, combination with other isotopic data is required. (c) 2006 Elsevier Ltd. All rights reserved.