Abstract

This test method covers a potentiometric titration procedure for determining the existent inorganic sulfate content of hydrous, anhydrous ethanol, and anhydrous denatured ethanol, which is added as a blending agent with spark ignition fuels. It is intended for the analysis of denatured ethanol samples containing between 1.0 mg/kg to 20 mg/kg existent inorganic sulfate. (This standard is an adoption of ASTM D7318 - 19e1, Standard Test Method for Existent Inorganic Sulfate in Ethanol by Potentiometric Titration). This standard was published on 15 June 2021.