ASTM D7319-11e1

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Designation: D7319 − 11
StandardTest Method for
Determination of Existent and Potential Sulfate and
Inorganic Chloride in Fuel Ethanol by Direct Injection
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Suppressed Ion Chromatography
This standard is issued under the fixed designation D7319; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
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´ NOTE—Updated 13.1 editorially in October 2011.
1. Scope* Chloride and Other Anions by Ion Chromatography
D6299 Practice for Applying Statistical Quality Assurance
1.1 This test method covers a direct injection ion chromato-
and Control Charting Techniques to Evaluate Analytical
graphic procedure for determining existent and potential inor-
Measurement System Performance
ganic sulfate and total inorganic chloride content in hydrous
D6792 Practice for Quality System in Petroleum Products
and anhydrous denatured ethanol to be used in motor fuel
and Lubricants Testing Laboratories
applications. It is intended for the analysis of ethanol samples
D7318 TestMethodforExistentInorganicSulfateinEthanol
containing between 1.0–20 mg/kg of existent or potential
by Potentiometric Titration
inorganic sulfate and 1.0–50 mg/kg of inorganic chloride.
D7328 Test Method for Determination of Existent and Po-
1.2 The values stated in SI units are to be regarded as
tential Inorganic Sulfate and Total Inorganic Chloride in
standard. No other units of measurement are included in this
Fuel Ethanol by Ion Chromatography Using Aqueous
standard.
Sample Injection
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1.3 This standard does not purport to address all of the
2.2 European Norm Standards:
safety concerns, if any, associated with its use. It is the
EN 15492 Ethanol as a blending component for petrol -
responsibility of the user of this standard to establish appro-
Determination of inorganic chloride and sulfate content -
priate safety and health practices and determine the applica-
Ion chromatographic method
bility of regulatory limitations prior to use. Material Safety
3. Terminology
Data Sheets are available for reagents and materials. Review
them for hazards prior to usage.
3.1 Definitions of Terms Specific to This Standard:
3.1.1 existent inorganic sulfate, n—inorganic sulfate species
2. Referenced Documents
actually present in the sample at the time of analysis with no
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2.1 ASTM Standards:
oxidation treatment.
D1193 Specification for Reagent Water
3.1.2 inorganic chloride, n—chloride present as hydrochlo-
D4052 Test Method for Density, Relative Density, and API
ric acid, ionic salts of this acid, or mixtures of these.
Gravity of Liquids by Digital Density Meter
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3.1.3 inorganicsulfate,n—sulfate(SO )speciespresentas
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D4057 Practice for Manual Sampling of Petroleum and
sulfuric acid, ionic salts of this acid, or mixtures of these.
Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and 3.1.4 potential sulfate, n—inorganic sulfate species present
Petroleum Products after the sample has been reacted with an oxidizing agent.
D5827 Test Method for Analysis of Engine Coolant for
4. Summary of Test Method
4.1 For existent inorganic sulfate and total chloride, a small
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This test method is under the jurisdiction of ASTM Committee D02 on
volume of an ethanol sample is directly injected into a suitably
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.03 on Elemental Analysis. configured ion chromatograph in accordance with manufactur-
Current edition approved July 1, 2011. Published August 2011. Originally
er’s recommendations for this test method. For potential
approved in 2007. Last previous edition approved in 2009 as D7319–09. DOI:
sulfate, 0.5 mLof 30 % hydrogen peroxide solution is added to
10.1520/D7319-11.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D7319 − 11
NOTE 1—Chromatogram retention times may be different depending on instruments or columns used.
FIG. 1 Typical Ion Chromatogram of a Solution Containing 1 mg/L of Various Anions in Water
9.5 mL of the ethanol sample, and then injected into the ion one measure of the acceptability of gasoline com
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