<p>This International Standard specifies a method for the direct determination of water in petroleum products boiling</p>
<p>below 390 °C. It covers the mass fraction range 0,003 % (<i>m/m</i>) to 0,100%(<i>m/m</i>). It is not applicable to products</p>
<p>containing ketones or to residual fuel oils.</p>
<p>This International Standard may be applicable to lubricating base oils. However, the precision has not been</p>
<p>established for these materials.</p>
<p>The precision given in clause 12 is based upon data obtained using dual-cell, dual-electrolyte systems.</p>
<p>NOTE 1 A number of substances and classes of compounds associated with condensation or oxidation-reduction reactions</p>
<p>interfere in the determination of water by Karl Fischer titration. In petroleum products, the most common interferences are</p>
<p>hydrogen sulfide and mercaptan sulfur, however, mass fractions of these below 0,003 % (<i>m/m</i>) as sulfur will not cause</p>
<p>significant interference over the range 0,003 % (<i>m/m</i>) to 0,100%(<i>m/m</i>) water. Other organic sulfur compounds commonly</p>
<p>present such as sulfides, disulphides and thiophenes, do not interfere.</p>
<p>NOTE 2 An alternative procedure is provided for information in annex B for the direct determination of water over the range</p>
<p>0,003 % <i>(</i><i>V/V</i><i>) </i>to 0,100 % <i>(</i><i>V/V</i><i>) </i>in petroleum products. The limitations under which this alternative volume measurement may be</p>
<p>used are listed in annex B.</p>
<p>NOTE 3 For the purposes of this International Standard, the terms "% (<i>m/m</i>)" and "% (<i>V/V</i>)" are used to represent the mass</p>
<p>and volume fraction of a material respectively.</p>
Registration number (WIID)
2730
Scope
<p>This International Standard specifies a method for the direct determination of water in petroleum products boiling</p>
<p>below 390 °C. It covers the mass fraction range 0,003 % (<i>m/m</i>) to 0,100%(<i>m/m</i>). It is not applicable to products</p>
<p>containing ketones or to residual fuel oils.</p>
<p>This International Standard may be applicable to lubricating base oils. However, the precision has not been</p>
<p>established for these materials.</p>
<p>The precision given in clause 12 is based upon data obtained using dual-cell, dual-electrolyte systems.</p>
<p>NOTE 1 A number of substances and classes of compounds associated with condensation or oxidation-reduction reactions</p>
<p>interfere in the determination of water by Karl Fischer titration. In petroleum products, the most common interferences are</p>
<p>hydrogen sulfide and mercaptan sulfur, however, mass fractions of these below 0,003 % (<i>m/m</i>) as sulfur will not cause</p>
<p>significant interference over the range 0,003 % (<i>m/m</i>) to 0,100%(<i>m/m</i>) water. Other organic sulfur compounds commonly</p>
<p>present such as sulfides, disulphides and thiophenes, do not interfere.</p>
<p>NOTE 2 An alternative procedure is provided for information in annex B for the direct determination of water over the range</p>
<p>0,003 % <i>(</i><i>V/V</i><i>) </i>to 0,100 % <i>(</i><i>V/V</i><i>) </i>in petroleum products. The limitations under which this alternative volume measurement may be</p>
<p>used are listed in annex B.</p>
<p>NOTE 3 For the purposes of this International Standard, the terms "% (<i>m/m</i>)" and "% (<i>V/V</i>)" are used to represent the mass</p>
<p>and volume fraction of a material respectively.</p>
