<?xml version="1.0" encoding="UTF-8"?>
<term>
  <id>14130</id>
  <title>equilibrium assay</title>
  <longtitle>IUPAC Gold Book - equilibrium assay</longtitle>
  <doi>10.1351/goldbook.14130</doi>
  <code>14130</code>
  <status>current</status>
  <definitions>
    <item>
      <id>1</id>
      <text>Assay in which there is sufficient incubation time for the plateau phase of the signal to be reached and equilibrium has been established between the reactants.</text>
      <notes>
        <item>At this point, the signal is time-independent.</item>
      </notes>
      <links>
        <item>
          <term>end-point assay</term>
          <url>https://goldbook.iupac.org/terms/view/14128</url>
        </item>
        <item>
          <term>kinetic assay</term>
          <url>https://goldbook.iupac.org/terms/view/14152</url>
        </item>
      </links>
      <sources>
        <item>PAC, 2011, 83, 1129. 'Glossary of terms used in biomolecular screening (IUPAC Recommendations 2011)' on page 1139 (https://doi.org/10.1351/PAC-REC-09-05-03)</item>
      </sources>
    </item>
  </definitions>
  <altoutputs>
    <html>https://goldbook.iupac.org/terms/view/14130/html</html>
    <json>https://goldbook.iupac.org/terms/view/14130/json</json>
    <plain>https://goldbook.iupac.org/terms/view/14130/plain</plain>
  </altoutputs>
  <citation>Citation: 'equilibrium assay' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.14130</citation>
  <license>The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms.</license>
  <collection>If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .</collection>
  <disclaimer>The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.</disclaimer>
  <accessed>2026-06-14T12:47:41+00:00</accessed>
</term>
