| Autor: |
Maruyama, Wataru, Sakato, Kuniaki, Kajiwara, Masahiro |
| Zdroj: |
Journal of Labelled Compounds and Radiopharmaceuticals; July 1999, Vol. 42 Issue: 7 p621-627, 7p |
| Abstrakt: |
The 13C-urea breath test by infra-red absorption or mass spectra has been extensively used to detect. Helicobacter pylori infection. However, commercially available 13C-urea contains higher 18O, compared to natural urea. It is evidently important for this diagnosis to investigate the 18O-isotope effect on infra-red absorption or mass spectra, based on the quantitative analysis of 18O in 13C-urea. For this purpose, a new analytical method using mass spectroscopy has been established to determine 18O abundance in urea. Copyright © 1999 John Wiley & Sons, Ltd. |
| Databáze: |
Supplemental Index |
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