ASTM D7328-07
(Test Method)Standard Test Method for Determination of Total and Potential Inorganic Sulfate and Total Inorganic Chloride in Fuel Ethanol by Ion Chromatography Using Aqueous Sample Injection
Standard Test Method for Determination of Total and Potential Inorganic Sulfate and Total Inorganic Chloride in Fuel Ethanol by Ion Chromatography Using Aqueous Sample Injection
SCOPE
1.1 This test method covers an ion chromatographic procedure for the determination of the total and potential inorganic 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 and 20 mg/kg of total inorganic sulfate, 4.0 to 20 mg/kg of potential inorganic sulfate, and 0.75 to 50 mg/kg of total inorganic chloride.
1.2 &solely-SI-units;
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.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation:D7328–07
Standard Test Method for
Determination of Total 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 D 7328; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 6792 Guide for Quality System in Petroleum Products
and Lubricants Testing Laboratories
1.1 This test method covers an ion chromatographic proce-
2.2 Other Standard:
dure for the determination of the total and potential inorganic
ISO/CEN15492 Ethanol as a Blending Component for
sulfate and total inorganic chloride content in hydrous and
Petrol – Determination of Inorganic Chloride – Ion
anhydrous denatured ethanol to be used in motor fuel applica-
3
Chromatographic Method
tions. It is intended for the analysis of ethanol samples
containing between 0.55 and 20 mg/kg of total inorganic
3. Terminology
sulfate, 4.0 to 20 mg/kg of potential inorganic sulfate, and 0.75
3.1 Definitions of Terms Specific to This Standard:
to 50 mg/kg of total inorganic chloride.
3.1.1 inorganic chloride, n—chloride present as hydrochlo-
1.2 The values stated in SI units are to be regarded as
ric acid, ionic salts of this acid, or mixtures of these.
standard. No other units of measurement are included in this
3.1.2 inorganic sulfate, n—sulfate species present as sulfu-
standard.
ric acid, ionic salts of this acid, or mixtures of these.
1.3 This standard does not purport to address all of the
3.1.3 potential sulfate, n—total sulfur species present in the
safety concerns, if any, associated with its use. It is the
samplethatcanbeoxidizedtoinorganicsulfateinthepresence
responsibility of the user of this standard to establish appro-
of an oxidizing agent.
priate safety and health practices and determine the applica-
3.1.4 total sulfate, n—inorganic sulfate species actually
bility of regulatory limitations prior to use. Material Safety
present in the sample at the time of analysis with no oxidation
Data Sheets are available for reagents and materials. Review
treatment.
them for hazards prior to usage.
4. Summary of Test Method
2. Referenced Documents
2 4.1 For total inorganic sulfate and chloride, a small volume
2.1 ASTM Standards:
of a sample is evaporated to dryness and reconstituted to the
D 1193 Specification for Reagent Water
initial sample volume with deionized water, and injected into
D 4052 Test Method for Density and Relative Density of
an ion chromatograph consisting of appropriate ion exchange
Liquids by Digital Density Meter
columns, suppressor and a conductivity detector. For potential
D 4057 Practice for Manual Sampling of Petroleum and
sulfate, a small volume of a sample is evaporated to dryness
Petroleum Products
and reconstituted to the initial sample volume with 0.90 %
D 4177 Practice for Automatic Sampling of Petroleum and
hydrogen peroxide solution in water, and injected into an ion
Petroleum Products
chromatograph. Ions are separated based on their affinity for
D 5827 Test Method for Analysis of Engine Coolant for
exchangesitesoftheresinwithrespecttotheresin’saffinityfor
Chloride and Other Anions by Ion Chromatography
the eluent. The suppressor increases the sensitivity of the
D 6299 Practice for Applying Statistical Quality Assurance
method by both increasing the conductivity of the analytes and
Techniques to Evaluate Analytical Measurement System
decreasing the conductivity of the eluent. The suppressor
Performance
converts the eluent and the analytes to the corresponding
hydrogen form acids. Anions in the aqueous sample are
1
This test method is under the jurisdiction of ASTM Committee D02 on
quantified by integration of their responses compared with an
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
externalcalibrationcurve,calculatedasmg/Lforeachion.The
D02.03 on Elemental Analysis.
Current edition approved Jan. 1, 2007. Published February 2007.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D7328–07
FIG.
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.