ASTM D7923-17a
Standard Test Method for Water in Ethanol and Hydrocarbon Blends by Karl Fischer Titration
- Standard No.
- ASTM D7923-17a
- Release Date
- 2017
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM D7923-17ae1
- Latest
- ASTM D7923-19
- Scope
-
5.1 Blends of fuel ethanol and hydrocarbon have a limited solvency for water that is dependent upon temperature and the ratio of ethanol to hydrocarbon. Good handling practices are important during the blending, storage, and transportation of fuel to avoid water contamination. High concentrations of water can cause haze or phase separation in ethanol and hydrocarbon blends and lead to freezing problems at low temperatures. Water has also been associated with corrosion and filter plugging.
1.1 This test method covers the determination of water from 0.058201;% to 5.08201;%8201; by mass in blends of ethanol, hydrocarbon, and corresponding blends. It is intended for measuring water content of gasoline or other hydrocarbon blendstock, denatured fuel ethanol as cited in Specification D4806, and ethanol fuel blends such as those cited in Specification D5798 and Practice D7794. This test method is not applicable to samples that are phase separated.
1.1.1 Procedure A—For measurement of water up to 28201;% by mass in ethanol and hydrocarbon blends using coulometric Karl Fischer titration. This is the referee method for samples containing up to 28201;% water.
1.1.2 Procedure B—For measurement of water up to 5.48201;% by mass in ethanol and hydrocarbon blends using volumetric Karl Fischer titration.
1.2 This method measures mass percent water and allows for the alternative reporting of volume percent. This test method recommends the use of pyridine-free reagents.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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. Specific precautionary statements are given in Section 8.
1.5 This 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.
ASTM D7923-17a Referenced Document
- ASTM D1152 Standard Specification for Methanol (Methyl Alcohol)
- ASTM D1193 Standard Specification for Reagent Water
- ASTM D4057 Standard Practice for Manual Sampling of Petroleum and Petroleum Products
- ASTM D4175 Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
- ASTM D4177 Standard Practice for Automatic Sampling of Petroleum and Petroleum Products
- ASTM D4806 Standard Specification for Denatured Fuel Ethanol for Blending with Gasolines for Use as Automotive Spark-Ignition Engine Fuel
- ASTM D5798 Standard Specification for Fuel Ethanol (Ed75-Ed85) for Automotive Spark-Ignition Engines
- ASTM D6299 Standard Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measurement System Performance
- ASTM D6708 Standard Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purport to Measure the Same Property of a Material
- ASTM D7794 Standard Practice for Blending Mid-Level Ethanol Fuel Blends for Flexible-Fuel Vehicles with Automotive Spark-Ignition Engines
- ASTM E1064 Standard Test Method for Water in Organic Liquids by Coulometric Karl Fischer Titration
- ASTM E203 Standard Test Method for Water Using Volumetric Karl Fischer Titration
ASTM D7923-17a history
- 2019 ASTM D7923-19 Standard Test Method for Water in Ethanol and Hydrocarbon Blends by Karl Fischer Titration
- 2017 ASTM D7923-17ae1 Standard Test Method for Water in Ethanol and Hydrocarbon Blends by Karl Fischer Titration
- 2017 ASTM D7923-17a Standard Test Method for Water in Ethanol and Hydrocarbon Blends by Karl Fischer Titration
- 2017 ASTM D7923-17 Standard Test Method for Water in Ethanol and Hydrocarbon Blends by Karl Fischer Titration
- 2016 ASTM D7923-16 Standard Test Method for Water in Ethanol and Hydrocarbon Blends by Karl Fischer Titration
