1.1 This test method covers the determination of water from 0.05 to 5.0 % by mass in blends of ethanol, hydrocarbon, and corresponding blends. It is intended for measuring water content of gasoline or other hydrocarbon blendstock, denatured fuel ethanol as cited in Specification D4806 and ethanol fuel blends such as those cited in Specification D5798 and Practice D7794. 1.1.1 Procedure A--For measurement of water up to 2 % by mass in ethanol and hydrocarbon blends using coulometric Karl Fischer titration. 1.1.2 Procedure B--For measurement of water up to 5 % by mass in ethanol and hydrocarbon blends using volumetric Karl Fischer titration. 1.2 This test method measures mass percent water and allows for the alternative reporting of volume percent. This test method recommends the use of pyridine-free reagents. 1.3 Units--The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 8.
Keywordscoulometric; volumetric; Karl Fischer; ethanol; gasoline; hydrocarbon; pyridine-free; water content
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Withdrawn From Balloting
Ballot Item Approved as D7923-2016 and Pending Publication