Journal
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
Volume 16, Issue 5, Pages 468-472Publisher
JOHN WILEY & SONS LTD
DOI: 10.1002/rcm.599
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Gas chromatography/pyrolysis/isotope ratio mass spectrometry (GC/P/IRMS) is a relatively new method for on-line determination of H-2/H-1 isotope ratios. The influence of different parameters on the H-2/H-1 isotope ratios obtained in GC/P/IRMS has been thoroughly studied using several flavor compounds, such as 5-nonanone, linalool, menthol, linalyl acetate and 4-decanolide. The requirement of 'conditioning' the pyrolysis reactor to obtain reliable delta(2)H(V-SMOW) values is discussed. Furthermore, the influence of the carrier gas flow of the gas chromatograph on the completeness of pyrolysis and subsequently on the delta(2)H(V-SMOW) values is investigated in detail. The linear range of the compounds investigated is determined. The results show that calibrating the GC/P/IRMS system with secondary standard substances is absolutely necessary in order to obtain reliable delta(2)H(V-SMOW) values. In view of interlaboratory comparability, validation procedures are recommended. Copyright (C) 2002 John Wiley Sons, Ltd.
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