Fuel and Lubricant Testing


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ASTM E1064 - Water in Organic Liquids by Coulometric Karl Fischer Titration

We perform testing by ASTM E1064 to determine the water content in ethanol using a Karl Fischer reagent and automated coulometric titration procedure. Blends of denatured fuel ethanol and gasoline or similar hydrocarbons have a limited solvency for water. This solvency will vary depending on ethanol content, product temperature, and the base gasoline's aromatic content. A fuel blend of ethanol and gasoline contaminated by water will separate into a lower alcohol-rich aqueous phase and an upper hydrocarbon phase. Because normal spark-ignition engines will not run on the aqueous phase material, this separation is likely to cause serious operating problems. The phase separation of gasoline-ethanol blends is directly related to the total water content of the mixture.

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Sample quantity required: 5 ml

Alcor Petrolab also performs water content testing by ASTM D95ASTM D6304ASTM D1401ASTM D1744, and ASTM E203. These different test methods use different instruments or procedures or are used for certain sample types. Click on the test method number to learn more about each test.

For additional information on this test method or to purchase a copy of the method, please click HERE to open a new window and visit the ASTM website. Learn more about our laboratory's certifications and quality program here.