ASTM revises D1613 test method for measuring acidity in fuel ethanol

April 18, 2018 |

In Pennsylvania, members of ASTM International recently revised a key test method (D1613) that has been used to measure the acidity of fuel ethanol and denatured fuel ethanol, including ethanol used for car gasoline blends.

By including a new “nitrogen purge” as part of the test method, a laboratory can help ensure that carbon dioxide is removed. According to ASTM International member Shon Van Hulzen, the presence of carbon dioxide is known to produce incorrectly high acidity values which can affect the product’s ability to comply with the specification for denatured fuel ethanol used in automotive spark-ignition engines (D4806).

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Category: Fuels

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