ASTM D7328-16
(Test Method)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
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 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.
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Designation: D7328 − 16
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* D5827 Test Method for Analysis of Engine Coolant for
Chloride and Other Anions by Ion Chromatography
1.1 This test method covers an ion chromatographic proce-
D6299 Practice for Applying Statistical Quality Assurance
dure for the determination of the existent inorganic and
and Control Charting Techniques to Evaluate Analytical
potentialsulfateandtotalinorganicchloridecontentinhydrous
Measurement System Performance
and anhydrous denatured ethanol to be used in motor fuel
D6792 Practice for Quality System in Petroleum Products
applications. It is intended for the analysis of ethanol samples
and Lubricants Testing Laboratories
containing between 0.55 mg⁄kg and 20 mg⁄kg of existent
D7318 TestMethodforExistentInorganicSulfateinEthanol
inorganicsulfate,4.0 mg⁄kgto20 mg⁄kgofpotentialinorganic
by Potentiometric Titration
sulfate, and 0.75 mg⁄kg to 50 mg⁄kg of total inorganic chlo-
D7319 Test Method for Determination of Existent and Po-
ride.
tential Sulfate and Inorganic Chloride in Fuel Ethanol and
1.2 The values stated in SI units are to be regarded as
Butanol by Direct Injection Suppressed Ion Chromatog-
standard. No other units of measurement are included in this
raphy
standard.
2.2 Other Standard:
1.3 This standard does not purport to address all of the
ISO/CEN15492 Ethanol as a Blending Component for
safety concerns, if any, associated with its use. It is the
Petrol—Determination of Inorganic Chloride—Ion Chro-
3
responsibility of the user of this standard to establish appro-
matographic Method
priate safety and health practices and determine the applica-
3. Terminology
bility of regulatory limitations prior to use. Material Safety
Data Sheets are available for reagents and materials. Review
3.1 Definitions of Terms Specific to This Standard:
them for hazards prior to usage.
3.1.1 existent inorganic sulfate, n—inorganic sulfate species
actually present in the sample at the time of analysis with no
2. Referenced Documents
oxidation treatment.
2
2.1 ASTM Standards:
3.1.2 inorganic chloride, n—chloride present as hydrochlo-
D1193 Specification for Reagent Water
ric acid, ionic salts of this acid, or mixtures of these.
D4052 Test Method for Density, Relative Density, and API
3.1.3 inorganic sulfate, n—sulfate species present as sulfu-
Gravity of Liquids by Digital Density Meter
ric acid, ionic salts of this acid, or mixtures of these.
D4057 Practice for Manual Sampling of Petroleum and
3.1.4 potential sulfate, n—total inorganic sulfate species
Petroleum Products
present after the sample has been reacted with an oxidizing
D4177 Practice for Automatic Sampling of Petroleum and
agent.
Petroleum Products
4. Summary of Test Method
4.1 For existent inorganic sulfate and chloride, a small
1
This test method is under the jurisdiction of ASTM Committee D02 on
volume of a sample is evaporated to dryness and reconstituted
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.03 on Elemental Analysis.
to the initial sample volume with deionized water, and injected
Current edition approved Oct. 1, 2016. Published December 2016. Originally
into an ion chromatograph consisting of appropriate ion
approved in 2007. Last previous edition approved in 2013 as D7328 – 13. DOI:
exchange columns, suppressor and a conductivity detector. For
10.1520/D7328-16.
2
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
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 − 16
FIG. 1 Typical Ion Chromatogram of a Solution Containing 1 mg/kg of Various Anions in Water
potential sulfate, a small volume of a sample is evaporated to high concentration compared to the analyte of interest. Sample
dryness and reconstituted to the initial sample vo
...
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 − 13 D7328 − 16
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 0.550.55 mg ⁄kg and 2020 mg mg/kg ⁄kg of existent inorganic
sulfate, 4.04.0 mg ⁄kg to 2020 mg mg/kg ⁄kg of potential inorganic sulfate, and 0.750.75 mg ⁄kg to 5050 mg mg/kg ⁄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 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
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
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 System in Petroleum Products and Lubricants Testing Laboratories
D7318 Test Method for Existent Inorganic Sulfate in Ethanol by Potentiometric Titration
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 Petrol—Determination of Inorganic Chloride –
3
Ion Chloride—Ion Chromatographic Method
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 existent inorganic sulfate, n—inorganic sulfate species actually present in the sample at the time of analysis with no
oxidation treatment.
3.1.2 inorganic chloride, n—chloride present as hydrochloric acid, ionic salts of this acid, or mixtures of these.
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 Sept. 15, 2013Oct. 1, 2016. Published September 2013December 2016. Originally approved in 2007. Last previous edition approved in 20112013
as D7328 – 11.D7328 – 13. DOI: 10.1520/D7328-13.10.1520/D7328-16.
2
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from International Organization for Standardization (ISO), 1 rue de 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 − 16
FIG. 1 Typical Ion Chromatogram of a Solution Containing 1 mg/kg of Various Anions in Water
3.1.3 inorganic sulfate, n—sulfate species present as sulfuric acid, ionic salts of this acid, or mixtures of these.
3.1.4 potential sulfate, n—total inorganic sulfate species present after the sample has been reacted with an oxidizing agent.
4. Summary of Test Method
4.1 For existent inorganic sulfate and chl
...
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