Standard Test Method for Acidity in Ethanol and Ethanol Blends by Titration

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

04-05-2022

Publisher

American Society for Testing and Materials

1.1This test method covers the determination of acidity as acetic acid (see Specification D4806) in commonly available grades of denatured ethanol, and ethanol blends with gasoline ranging from E95 to E30. This test method is used for determining low levels of acidity, below 200 mg/kg (ppm mass), with the exclusion of carbon dioxide.

1.1.1Procedure A—Developed specifically for measurement of acidity by potentiometric titration. This is the referee method.

1.1.2Procedure B—Developed specifically for measurement of acidity by color end point titration.

1.2The ethanol and ethanol blends may be analyzed directly by this test method without any sample preparation.

1.3Review the current and appropriate Material Safety Data Sheets (MSDS) for detailed information concerning toxicity, first aid procedures, and safety precautions and proper personal protective equipments.

1.4The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Some specific hazards statements are given in Section 7 on Hazards.

1.6This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Committee	D 02
DocumentType	Test Method
Pages	7
PublisherName	American Society for Testing and Materials
Status	Current
Supersedes	ASTM D 7795 : 2015

ASTM E 3237 : 2019	Standard Specification for Undenatured Ethanol from Biomass for Use in Industrial Applications
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ASTM D 6299 : 2022	Standard Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measurement System Performance