<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>Haiping Qi</dc:contributor>
  <dc:contributor>Lauren V. Tarbox</dc:contributor>
  <dc:contributor>Jennifer M. Lorenz</dc:contributor>
  <dc:contributor>Bryan Buck</dc:contributor>
  <dc:creator>Tyler B. Coplen</dc:creator>
  <dc:date>2015</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;Ice core from Greenland was melted, filtered, homogenised, loaded into glass ampoules, sealed, autoclaved to eliminate biological activity, and calibrated by dual-inlet isotope-ratio mass spectrometry. This isotopic reference material (RM), USGS46, is intended as one of two secondary isotopic reference waters for daily normalisation of stable hydrogen (&amp;delta;&lt;/span&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;span&gt;H) and stable oxygen (&amp;delta;&lt;/span&gt;&lt;sup&gt;18&lt;/sup&gt;&lt;span&gt;O) isotopic analysis of water with a mass spectrometer or a laser absorption spectrometer. The measured &amp;delta;&lt;/span&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;span&gt;H and &amp;delta;&lt;/span&gt;&lt;sup&gt;18&lt;/sup&gt;&lt;span&gt;O values of this reference water were &amp;minus;235.8&amp;nbsp;&amp;plusmn;&amp;nbsp;0.7&amp;permil; and &amp;minus;29.80&amp;nbsp;&amp;plusmn;&amp;nbsp;0.03&amp;permil;, respectively, relative to VSMOW on scales normalised such that the &amp;delta;&lt;/span&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;span&gt;H and &amp;delta;&lt;/span&gt;&lt;sup&gt;18&lt;/sup&gt;&lt;span&gt;O values of SLAP reference water are, respectively, &amp;minus;428 and &amp;minus;55.5&amp;permil;. Each uncertainty is an estimated expanded uncertainty (&lt;/span&gt;&lt;i&gt;U&amp;nbsp;&lt;/i&gt;&lt;span&gt;=&lt;/span&gt;&lt;i&gt;&amp;nbsp;&lt;/i&gt;&lt;span&gt;2&lt;/span&gt;&lt;i&gt;u&lt;/i&gt;&lt;sub&gt;c&lt;/sub&gt;&lt;span&gt;) about the reference value that provides an interval that has about a 95-percent probability of encompassing the true value. This reference water is available in cases containing 144 glass ampoules that are filled with either 4&amp;nbsp;ml or 5&amp;nbsp;ml of water per ampoule.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1111/j.1751-908X.2013.00267.x</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Association scientifique pour la géologie et ses applications with the assistance of the Centre national de la recherche scientifique</dc:publisher>
  <dc:title>USGS46 Greenland ice core water – A new isotopic reference material for δ2H and δ18O measurements of water</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>