<?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>Craig A. Stricker</dc:contributor>
  <dc:contributor>Cayce A. Gulbransen</dc:contributor>
  <dc:contributor>Matthew P. Emmons</dc:contributor>
  <dc:creator>Craig A. Johnson</dc:creator>
  <dc:date>2018</dc:date>
  <dc:description>&lt;p&gt;This report describes procedures used in the Geology, Geophysics, and Geochemistry Science Center of the U.S. Geological Survey in Denver, Colorado, to determine the stable-isotope ratios &lt;sup&gt;13&lt;/sup&gt;C/&lt;sup&gt;12&lt;/sup&gt;C, &lt;sup&gt;15&lt;/sup&gt;N/&lt;sup&gt;14&lt;/sup&gt;N, and &lt;sup&gt;34&lt;/sup&gt;S/&lt;sup&gt;32&lt;/sup&gt;S in solid materials. The procedures use elemental analyzers connected directly to gas-source isotope-ratio mass spectrometers. A different elemental–analyzer–mass-spectrometer system is used for &lt;sup&gt;13&lt;/sup&gt;C/&lt;sup&gt;12&lt;/sup&gt;C and &lt;sup&gt;15&lt;/sup&gt;N/&lt;sup&gt;14&lt;/sup&gt;N than is used for &lt;sup&gt;34&lt;/sup&gt;S/&lt;sup&gt;32&lt;/sup&gt;S to accommodate differences in reagents, catalysts, and instrument settings.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/tm5D4</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey</dc:publisher>
  <dc:title>Determination of δ13C, δ15N, or δ34S by isotope-ratio-monitoring mass spectrometry using an elemental analyzer</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>