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.
ASTM D7796-12 Referenced Document
ASTM D3700 Standard Practice for Obtaining LPG Samples Using a Floating Piston Cylinder
ASTM D4057 Standard Practice for Manual Sampling of Petroleum and Petroleum Products
ASTM D4307 Standard Practice for Preparation of Liquid Blends for Use as Analytical Standards
ASTM D4626 Standard Practice for Calculation of Gas Chromatographic Response Factors
ASTM D6304 Standard Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fischer Titration
ASTM D7618 Standard Specification for Ethyl Tertiary-Butyl Ether (ETBE) for Blending with Aviation Spark-Ignition Engine Fuel
ASTM E355 Standard Practice for Gas Chromatography Terms and Relationships*, 2024-04-20 Update
ASTM E594 Standard Practice for Testing Flame Ionization Detectors Used in Gas or Supercritical Fluid Chromatography
ASTM D7796-12 history
2021ASTM D7796-21 Standard Test Method for Analysis of Ethyl tert-Butyl Ether (ETBE) by Gas Chromatography
2017ASTM D7796-17 Standard Test Method for Analysis of Ethyl tert-Butyl Ether (ETBE) by Gas Chromatography
2012ASTM D7796-12 Standard Test Method for Analysis of Ethyl tert-Butyl Ether (ETBE) by Gas Chromatography