Preliminary assessment of stable nitrogen and oxygen isotopic composition of USGS51 and USGS52 nitrous oxide reference gases and perspectives on calibration needs.

Nathaniel E OstromHasand GandhiTyler B CoplenSakae ToyodaJ K BöhlkeWilli A BrandKaren L CasciottiJens DyckmansAnette GiesemannJoachim MohnReinhard WellLongfei YuNaohiro Yoshida

Published in: Rapid communications in mass spectrometry : RCM (2018)

The agreement of isotope-delta values obtained in the interlaboratory comparison was not sufficient to provide reliable accurate isotope measurement values for USGS51 and USGS52. We propose that provisional values for the isotopic composition of USGS51 and USGS52 determined at the Tokyo Institute of Technology can be adopted for normalizing and reporting sample data until further refinements are achieved through additional calibration efforts.

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