ASTM D7328-23

Standard Test Method for Determination of Existent and Potential Inorganic Sulfate and Total Inorganic Chloride in Fuel Ethanol by Ion Chromatography Using Aqueous Sample Injection

SIGNIFICANCE AND USE
5.1 Sulfates and chlorides may be found in filter plugging deposits and fuel injector deposits. The acceptability for use of the fuel components and the finished fuels depends on the sulfate and chloride content.  
5.2 Existent and potential inorganic sulfate and total chloride content, as measured by this test method, can be used as one measure of the acceptability of gasoline components for automotive spark-ignition engine fuel use.
SCOPE
1.1 This test method covers an ion chromatographic procedure for the determination of the existent inorganic and potential sulfate and total inorganic chloride content in hydrous and anhydrous denatured ethanol to be used in motor fuel applications. It is intended for the analysis of ethanol samples containing between 0.55 mg/kg and 20 mg/kg of existent inorganic sulfate, 4.0 mg/kg to 20 mg/kg of potential inorganic sulfate, and 0.75 mg/kg to 50 mg/kg of total inorganic chloride.  
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, health, and environmental 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  
1.4 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.

General Information

• Status: Published
• Publication Date: 28-Feb-2023
• ICS: 75.160.20 - Liquid fuels
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.03 - Elemental Analysis

Standards Content (Sample)

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.
Designation: D7328 − 23
Standard Test Method for
Determination of Existent and Potential Inorganic Sulfate
and Total Inorganic Chloride in Fuel Ethanol by Ion
1
Chromatography Using Aqueous Sample Injection
This standard is issued under the fixed designation D7328; 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.
1. Scope* D4052 Test Method for Density, Relative Density, and API
Gravity of Liquids by Digital Density Meter
1.1 This test method covers an ion chromatographic proce-
D4057 Practice for Manual Sampling of Petroleum and
dure for the determination of the existent inorganic and
Petroleum Products
potential sulfate and total inorganic chloride content in hydrous
D4175 Terminology Relating to Petroleum Products, Liquid
and anhydrous denatured ethanol to be used in motor fuel
Fuels, and Lubricants
applications. It is intended for the analysis of ethanol samples
D4177 Practice for Automatic Sampling of Petroleum and
containing between 0.55 mg ⁄kg and 20 mg ⁄kg of existent
Petroleum Products
inorganic sulfate, 4.0 mg ⁄kg to 20 mg ⁄kg of potential inorganic
D5827 Test Method for Analysis of Engine Coolant for
sulfate, and 0.75 mg ⁄kg to 50 mg ⁄kg of total inorganic chlo-
Chloride and Other Anions by Ion Chromatography
ride.
D6299 Practice for Applying Statistical Quality Assurance
1.2 The values stated in SI units are to be regarded as
and Control Charting Techniques to Evaluate Analytical
standard. No other units of measurement are included in this
Measurement System Performance
standard.
D6792 Practice for Quality Management Systems in Petro-
1.3 This standard does not purport to address all of the
leum Products, Liquid Fuels, and Lubricants Testing
safety concerns, if any, associated with its use. It is the Laboratories
responsibility of the user of this standard to establish appro-
D7318 Test Method for Existent Inorganic Sulfate in Ethanol
priate safety, health, and environmental practices and deter- by Potentiometric Titration
mine the applicability of regulatory limitations prior to use.
D7319 Test Method for Determination of Existent and Po-
Material Safety Data Sheets are available for reagents and
tential Sulfate and Inorganic Chloride in Fuel Ethanol and
materials. Review them for hazards prior to usage Butanol by Direct Injection Suppressed Ion Chromatog-
1.4 This international standard was developed in accor-
raphy
dance with internationally recognized principles on standard-
2.2 Other Standard:
ization established in the Decision on Principles for the
ISO/CEN15492 Ethanol as a Blending Component for
Development of International Standards, Guides and Recom-
Petrol—Determination of Inorganic Chloride—Ion Chro-
3
mendations issued by the World Trade Organization Technical
matographic Method
Barriers to Trade (TBT) Committee.
3. Terminology
2. Referenced Documents
3.1 Definitions:
2
2.1 ASTM Standards:
3.1.1 For definitions of terms used in this test method, refer
D1193 Specification for Reagent Water
to Terminology D4175.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 existent inorganic sulfate, n—inorganic sulfate species
1
This test method is under the jurisdiction of ASTM Committee D02 on actually present in the sample at the time of analysis with no
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
oxidation treatment.
Subcommittee D02.03 on Elemental Analysis.
3.2.2 inorganic chloride, n—chloride present as hydrochlo-
Current edition approved March 1, 2023. Published April 2023. Originally
approved in 2007. Last previous edition approved in 2022 as D7328 – 22. DOI:
ric acid, ionic salts of this acid, or mixtures of these.
10.1520/D7328- 23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from International Organization for Standardization (ISO), 1 rue de
the ASTM website. Varembé, Case postale 56, CH-1211, Geneva 20, Switzerland, http://www.iso.ch.
*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
1

---------------------- Page: 1 ----------------------
D7328 − 23
FIG. 1 Typical Ion Chromatogram of a Solution Containing 1 mg/kg of Various Anions in Water
3.2.3 inorga
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7328 − 22 D7328 − 23
Standard Test Method for
Determination of Existent and Potential Inorganic Sulfate
and Total Inorganic Chloride in Fuel Ethanol by Ion
1
Chromatography Using Aqueous Sample Injection
This standard is issued under the fixed designation D7328; 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.
1. Scope*
1.1 This test method covers an ion chromatographic procedure for the determination of the existent inorganic and potential sulfate
and total inorganic chloride content in hydrous and anhydrous denatured ethanol to be used in motor fuel applications. It is intended
for the analysis of ethanol samples containing between 0.55 mg ⁄kg and 20 mg ⁄kg of existent inorganic sulfate, 4.0 mg ⁄kg to
20 mg ⁄kg of potential inorganic sulfate, and 0.75 mg ⁄kg to 50 mg ⁄kg of total inorganic chloride.
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, health, and environmental 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
1.4 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.
2. Referenced Documents
2
2.1 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
D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D5827 Test Method for Analysis of Engine Coolant for Chloride and Other Anions by Ion Chromatography
D6299 Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measure-
ment System Performance
D6792 Practice for Quality Management Systems in Petroleum Products, Liquid Fuels, and Lubricants Testing Laboratories
D7318 Test Method for Existent Inorganic Sulfate in Ethanol by Potentiometric Titration
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.03 on Elemental Analysis.
Current edition approved Oct. 1, 2022March 1, 2023. Published October 2022April 2023. Originally approved in 2007. Last previous edition approved in 20172022 as
D7328 – 17. DOI: 10.1520/D7328- 22.22. DOI: 10.1520/D7328- 23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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
1

---------------------- Page: 1 ----------------------
D7328 − 23
D7319 Test Method for Determination of Existent and Potential Sulfate and Inorganic Chloride in Fuel Ethanol and Butanol by
Direct Injection Suppressed Ion Chromatography
2.2 Other Standard:
ISO/CEN15492 Ethanol as a Blending Component for Petrol—Determination of Inorganic Chloride—Ion Chromatographic
3
Method
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this test method, refer to Terminology D4175.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 existent inorganic sulfate, n—inorganic sulfate species actually present in the sample at the time of analysis with no oxidation
treatment.
3.2.2 inorganic chloride, n—chloride present as hydrochloric acid, ionic salts of this acid, or mixtures of these.
3.2.3 inorganic sulfate, n—sulfate species present as sulfuric acid, ionic salts of this acid, o
...