ASTM D7318 - 13

    Standard Test Method for Existent Inorganic Sulfate in Ethanol by Potentiometric Titration

    Active Standard ASTM D7318 | Developed by Subcommittee: D02.03

    Book of Standards Volume: 05.04


      Format Pages Price  
    PDF Version 6 $42.00   ADD TO CART
    Print Version 6 $42.00   ADD TO CART
    Standard + Redline PDF Bundle 12 $50.40   ADD TO CART


    Significance and Use

    5.1  Ethanol is used as a blending agent added to gasoline. Sulfates are indicated in filter plugging deposits and fuel injector deposits. When fuel ethanol is burned, sulfates may contribute to sulfuric acid emissions. Ethanol acceptability for use depends on the sulfate content. Sulfate content, as measured by this test method, can be used as one measure of determination of the acceptability of ethanol for automotive spark-ignition engine fuel use.

    1. Scope

    1.1 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 1.0–20 mg/kg existent inorganic sulfate.

    1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.3 This standard does not purport to address all of the safety concerns, 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. Material Safety Data Sheets are available for reagents and materials. Review them for hazards prior to usage.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D1193 Specification for Reagent Water

    D4052 Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter

    D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

    D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products

    D6299 Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measurement System Performance


    ICS Code

    ICS Number Code 71.040.40 (Chemical analysis); 75.160.20 (Liquid fuels)

    UNSPSC Code

    UNSPSC Code 15101511(Ethanol)


    DOI: 10.1520/D7318

    ASTM International is a member of CrossRef.

    ASTM D7318

    Citing ASTM Standards
    Back to Top