An online temperature-controlled vacuum-equilibration preparation system for the measurement of δ2H values of non-exchangeable-H and of δ18O values in organic materials by isotope-ratio mass spectrometry

Rapid Communications in Mass Spectrometry : RCM
Leonard I WassenaarLeonardo Sisti

Abstract

Measurement of δ(2) H values in non-exchangeable-H (δ(2) H(n)) and δ(18)O values in organic environmental samples are inconsistent among laboratories worldwide due to varied and lengthy approaches in controlling for H isotope exchange (for δ(2)H(n) values) and removal of trace moisture (δ(2)H(n) and δ(18)O values), which undermines the comparability of organic δ(2)H and δ(18)O data produced among different laboratories. An online preparation system was developed for the measurement of the δ(2)H(n) and δ(18)O values of organic samples, coupled to isotope-ratio mass spectrometers. The system features a 50-position autosampler and isolation valve where (1) the samples are held isothermal between ambient to 40-120 ± 0.1 °C for H isotopic exchange experiments (δ(2) H(n)) and drying of hygroscopic samples (δ(2) H(n) and δ(18)O), (2) the samples are evacuated to <5 mbar and flushed with helium for moisture and N(2) removal, and (3) injection of up to 500 μL of H(2)O is possible for controlled vapour exchangeable-H experiments. The system provides highly reproducible and precise δ(2)H(n) isotope estimates for a range of organic keratinous standard powders over a wide range of experimental temperatures. A reproducible sample processing ...Continue Reading

References

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Jul 28, 2005·Rapid Communications in Mass Spectrometry : RCM·Gabriel J BowenJames R Ehleringer
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Mar 24, 2009·Rapid Communications in Mass Spectrometry : RCM·Lesley A ChessonJames R Ehleringer
Jul 4, 2009·Rapid Communications in Mass Spectrometry : RCM·Jeffrey F KellyLeonard I Wassenaar
Jun 24, 2011·Rapid Communications in Mass Spectrometry : RCM·Haiping QiLeonard I Wassenaar
Jul 8, 2011·Rapid Communications in Mass Spectrometry : RCM·Haiping Qi, Tyler B Coplen
Oct 25, 2011·Journal of Forensic Dental Sciences·Raghu Radhakrishnan
Feb 1, 2012·PloS One·Ana G Popa-LisseanuChristian C Voigt
Aug 27, 2014·Rapid Communications in Mass Spectrometry : RCM·I C C von HolsteinM J Collins

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Citations

Jan 24, 2018·Rapid Communications in Mass Spectrometry : RCM·Isabella von HolsteinMatthew J Collins
Oct 5, 2016·Ecology and Evolution·David X SotoLeonard I Wassenaar
Oct 1, 2020·BMC Ecology·Patrick G R WrightDanilo Russo
Sep 1, 2016·Comprehensive Reviews in Food Science and Food Safety·Federica CaminEdi Piasentier
May 20, 2021·Rapid Communications in Mass Spectrometry : RCM·Jason Newton

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