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Lake Louise Water (USGS47): A new isotopic reference water for stable hydrogen and oxygen isotope measurements
Author(s) -
Qi Haiping,
Lorenz Jennifer M.,
Coplen Tyler B.,
Tarbox Lauren,
Mayer Bernhard,
Taylor Steve
Publication year - 2013
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.6789
Subject(s) - ampoule , chemistry , mass spectrometry , isotopes of oxygen , analytical chemistry (journal) , isotope analysis , stable isotope ratio , environmental chemistry , mineralogy , chromatography , nuclear chemistry , oceanography , geology , nuclear physics , physics
RATIONALE Because of the paucity of isotopic reference waters for daily use, a new secondary isotopic reference material has been prepared from Lake Louise water from Alberta, Canada, for international distribution. METHODS This water was filtered, homogenized, loaded into glass ampoules, sealed with a torch, autoclaved to eliminate biological activity, and measured by dual‐inlet isotope‐ratio mass spectrometry. This isotopic reference water is available by the case of 144 glass ampoules containing 5 mL of water in each ampoule. RESULTS The δ 2 H and δ 18 O values of this reference water are −150.2 ± 0.5 ‰ and −19.80 ± 0.02 ‰, respectively, relative to VSMOW, on scales normalized such that the δ 2 H and δ 18 O values of SLAP reference water are, respectively, –428 and −55.5 ‰. Each uncertainty is an estimated expanded uncertainty ( U = 2 u c ) about the reference value that provides an interval that has about a 95 % probability of encompassing the true value. CONCLUSIONS This isotopic reference material, designated as USGS47, is intended as one of two isotopic reference waters for daily normalization of stable hydrogen and stable oxygen isotopic analysis of water with a mass spectrometer or a laser absorption spectrometer. Published in 2013. This article is a U.S. Government work and is in the public domain in the USA.