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ASTM-D7318:2011 Edition(Redline)

ASTM-D7318:2011 Edition(Redline)

$26.65

D7318-11 Standard Test Method for Existent Inorganic Sulfate in Ethanol by Potentiometric Titration (Redline)

Published By Publication Date Number of Pages
ASTM 2011 7
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Significance and Use

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 Chart

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