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Coulometry
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<p>In <a href="/facts/Analytical_electrochemistry/AmKUuvVo">analytical electrochemistry</a>, coulometry is the measure of charge (<a href="/facts/Coulomb/WNV9ueGr">coulombs</a>) transfer during an <a href="/facts/Electrochemistry/C0RUWpBH">electrochemical</a> <a href="/facts/Redox/Pyd5RVcj">redox reaction</a>. It can be used for precision measurements of charge, but coulometry is mainly used for analytical applications to determine the amount of matter transformed. </p><p>There are two main categories of coulometric techniques. Amperostatic coulometry, or coulometric <a href="/facts/Titration/gGUfvQcW">titration</a> keeps the <a href="/facts/Current_(electricity)/Dc1xdnUX">current</a> constant using an <a href="/facts/Amperostat/4yu6rfn5">amperostat</a>. Potentiostatic coulometry holds the <a href="/facts/Electric_potential/Nmqm6hm5">electric potential</a> constant during the reaction using a <a href="/facts/Potentiostat/3Dd5yhQx">potentiostat</a>. </p>