USGS48 Puerto Rico precipitation - A new isotopic reference material for δ2H and δ18O measurements of water

Isotopes in Environmental and Health Studies
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Abstract

A new secondary isotopic reference material has been prepared from Puerto Rico precipitation, which was filtered, homogenised, loaded into glass ampoules, sealed with a torch, autoclaved to eliminate biological activity, and calibrated by dual-inlet isotope-ratio mass spectrometry. This isotopic reference material, designated as USGS48, is intended to be one of two isotopic reference waters for daily normalisation of stable hydrogen (δ2H) and stable oxygen (δ18O) isotopic analysis of water with a mass spectrometer or a laser absorption spectrometer. The δ2H and δ18O values of this reference water are−2.0±0.4 and−2.224±0.012 ‰, respectively, relative to Vienna Standard Mean Ocean Water on scales normalised such that the δ2H and δ18O values of Standard Light Antarctic Precipitation reference water are−428 and−55.5 ‰, respectively. Each uncertainty is an estimated expanded uncertainty (U=2uc) about the reference value that provides an interval that has about a 95 % probability of encompassing the true value. This isotopic reference water is available by the case of 144 glass ampoules containing 5 mL of water in each ampoule.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title USGS48 Puerto Rico precipitation - A new isotopic reference material for δ2H and δ18O measurements of water
Series title Isotopes in Environmental and Health Studies
DOI 10.1080/10256016.2014.905555
Volume 50
Issue 4
Year Published 2014
Language English
Publisher Taylor & Francis
Contributing office(s) National Research Program - Eastern Branch
Description 6 p.
First page 442
Last page 447
Country United States
State Puerto Rico
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