ASTM D7796 - 12

    Standard Test Method for Analysis of Ethyl tert-Butyl Ether (ETBE) by Gas Chromatography

    Active Standard ASTM D7796 | Developed by Subcommittee: D02.J0.02

    Book of Standards Volume: 05.04


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    Significance and Use

    5.1 The presence of impurities in ETBE product can have a deleterious effect upon the value of ETBE as a fuel additive. Oxygenate and olefin contents are of primary concern. This test method provides a knowledge of the composition of ETBE product. This is useful in the evaluation of process operations control, in the valuation of the product, and for regulatory purposes.

    1. Scope

    1.1 This test method covers the determination of the purity of ethyl tert-butyl ether (ETBE) by gas chromatography. It also provides a procedure to measure impurities in ETBE such as C4 to C12 olefins, methyl, isopropyl and tert-butyl alcohols, methyl sec-butyl and methyl tert-amyl ethers, acetone, and methyl ethyl ketone.

    1.2 This test method is not applicable to the determination of ETBE in gasoline.

    1.3 Water cannot be determined by this test method and shall be measured by a procedure such as Test Method D6304 and the result used to normalize the chromatographic values.

    1.4 Most of the impurities in ETBE are resolved by the test method, however, some co-elution is encountered.

    1.5 This test method is inappropriate for impurities that boil at temperatures higher than 180°C or for impurities that cause poor or no response in a flame ionization detector, such as water.

    1.6 The values stated in SI units of measurement are preferred and used throughout the standard. Alternate units, in common usage, are also provided to improve clarity and aid the user of this test methods.

    1.7 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.


    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

    D3700 Practice for Obtaining LPG Samples Using a Floating Piston Cylinder

    D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

    D4307 Practice for Preparation of Liquid Blends for Use as Analytical Standards

    D4626 Practice for Calculation of Gas Chromatographic Response Factors

    D6304 Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fischer Titration

    D7618 Specification for Ethyl Tertiary-Butyl Ether (ETBE) for Blending with Aviation Spark-Ignition Engine Fuel

    E355 Practice for Gas Chromatography Terms and Relationships

    E594 Practice for Testing Flame Ionization Detectors Used in Gas or Supercritical Fluid Chromatography


    ICS Code

    ICS Number Code 71.080.60 (Alcohols. Ethers); 75.160.20 (Liquid fuels)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/D7796-12

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