<p class="MsoBodyText"><span lang="EN-GB">This document specifies methods used to measure the water content of polyols employed as polyurethane raw materials. </span></p>
<p class="MsoBodyText"><span lang="EN-GB">Method A is a manual amperometric method which has been included to better define the principles of the Karl Fischer measurement. Amperometric methods are applicable to a wide range of polyols, including those which have enough colour to obscure a visual end-point. Method B includes an automated amperometric procedure and an automated coulometric procedure. </span></p>
<p class="MsoBodyText"><span lang="EN-GB">The coulometric procedure is an absolute method that does not require calibration and gives improved sensitivity compared with amperometric methods.</span></p>
Registration number (WIID)
85621
Scope
<p class="MsoBodyText"><span lang="EN-GB">This document specifies methods used to measure the water content of polyols employed as polyurethane raw materials. </span></p>
<p class="MsoBodyText"><span lang="EN-GB">Method A is a manual amperometric method which has been included to better define the principles of the Karl Fischer measurement. Amperometric methods are applicable to a wide range of polyols, including those which have enough colour to obscure a visual end-point. Method B includes an automated amperometric procedure and an automated coulometric procedure. </span></p>
<p class="MsoBodyText"><span lang="EN-GB">The coulometric procedure is an absolute method that does not require calibration and gives improved sensitivity compared with amperometric methods.</span></p>
