A new continuous flow isotope ratio mass spectrometry system for the analysis of δ2H, δ17O and δ 18O of small (120 μg) water samples in atmospheric applications

Peter Franz*, Thomas Röckmann

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

A new continuous-flow system for the analysis of the complete stable isotopic composition of water vapor has been developed. The sample size is reduced to only 120 μg (≡120 nL of liquid substance) of water, yielding precisions of about 0.7, 1.3 and 7‰ for δ17O, δ18O and δ2H, respectively. The total time for the analysis of a sample is about 150 min including purging times. Oxidized steel surfaces can be a source of memory effects which can be corrected for. The system is predestined for atmospheric applications in the tropopause region, as the sample can be directly introduced into the system from a cryogenic trap.

Original languageEnglish
Pages (from-to)1429-1435
Number of pages7
JournalRapid Communications in Mass Spectrometry
Volume18
Issue number13
DOIs
Publication statusPublished - 16 Jul 2004

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