ASTM D3242-11(2017)
(Test Method)Standard Test Method for Acidity in Aviation Turbine Fuel
Standard Test Method for Acidity in Aviation Turbine Fuel
SIGNIFICANCE AND USE
5.1 Some acids can be present in aviation turbine fuels due either to the acid treatment during the refining process or to naturally occurring organic acids. Significant acid contamination is not likely to be present because of the many check tests made during the various stages of refining. However, trace amounts of acid can be present and are undesirable because of the consequent tendencies of the fuel to corrode metals that it contacts or to impair the water separation characteristics of the aviation turbine fuel.
5.2 This test method is designed to measure the levels of acidity that can be present in aviation turbine fuel and is not suitable for determining significant acid contamination.
SCOPE
1.1 This test method covers the determination of the acidity in aviation turbine fuel in the range from 0.000 mg/g to 0.100 mg/g KOH.
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.
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.
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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: D3242 − 11 (Reapproved 2017)
Designation: 354/98
Standard Test Method for
1
Acidity in Aviation Turbine Fuel
This standard is issued under the fixed designation D3242; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope sample, required to titrate a sample in a specified solvent to a
specified endpoint using a specified detection system.
1.1 This test method covers the determination of the acidity
3.1.1.1 Discussion—in this test method, the solvent is a
in aviation turbine fuel in the range from 0.000 mg⁄g to
toluene-water-isopropanol mixture and the end point is deter-
0.100 mg⁄g KOH.
mined when a green/green brown color is obtained using the
1.2 The values stated in SI units are to be regarded as
specified p-naphtholbenzein indicator solution.
standard. No other units of measurement are included in this
4. Summary of Test Method
standard.
1.3 This standard does not purport to address all of the
4.1 The sample is dissolved in a mixture of toluene and
safety concerns, if any, associated with its use. It is the isopropyl alcohol containing a small amount of water. The
responsibility of the user of this standard to establish appro-
resulting single phase solution is blanketed by a stream of
priate safety and health practices and determine the applica- nitrogen bubbling through it and is titrated with standard
bility of regulatory limitations prior to use.
alcoholicpotassiumhydroxidetotheendpointindicatedbythe
1.4 This international standard was developed in accor- color change (orange in acid and green in base) of the added
dance with internationally recognized principles on standard-
p-naphtholbenzein solution.
ization established in the Decision on Principles for the
5. Significance and Use
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 5.1 Some acids can be present in aviation turbine fuels due
Barriers to Trade (TBT) Committee. either to the acid treatment during the refining process or to
naturally occurring organic acids. Significant acid contamina-
2. Referenced Documents
tion is not likely to be present because of the many check tests
2
made during the various stages of refining. However, trace
2.1 ASTM Standards:
amounts of acid can be present and are undesirable because of
D664 Test Method for Acid Number of Petroleum Products
by Potentiometric Titration the consequent tendencies of the fuel to corrode metals that it
contacts or to impair the water separation characteristics of the
D1193 Specification for Reagent Water
aviation turbine fuel.
3. Terminology
5.2 This test method is designed to measure the levels of
3.1 Definitions:
acidity that can be present in aviation turbine fuel and is not
3.1.1 acid number, n—the quantity of a specified base,
suitable for determining significant acid contamination.
expressed in milligrams of potassium hydroxide per gram of
6. Apparatus
6.1 Buret—A 25 mL buret graduated in 0.1 mL
1
This test method is under the jurisdiction of ASTM Committee D02 on
subdivisions, or a 10 mL buret graduated in 0.05 mL subdivi-
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.06 on Analysis of Liquid Fuels and Lubricants.
sions.
Current edition approved May 1, 2017. Published June 2017. Originally
approved in 1973. Last previous edition approved in 2011 as D3242 – 11. DOI: NOTE 1—An automated buret capable of delivering titrant amounts in
10.1520/D3242-11R17. 0.05 mL or smaller increments can be used, but the stated precision data
This test method has been approved by the sponsoring committees and accepted
were obtained using manual burets only.
by the cooperating societies in accordance with established procedures.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 7. Reagents and Materials
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.1 Purity of Reagents—Reagent grade chemicals shall be
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. used in all tests. Unless otherwise indicated, it is intended that
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D3242 − 11 (2017)
all reagents
...
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
Designation: D3242 − 11 (Reapproved 2017)
Designation: 354/98
Standard Test Method for
1
Acidity in Aviation Turbine Fuel
This standard is issued under the fixed designation D3242; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope sample, required to titrate a sample in a specified solvent to a
specified endpoint using a specified detection system.
1.1 This test method covers the determination of the acidity
3.1.1.1 Discussion—in this test method, the solvent is a
in aviation turbine fuel in the range from 0.000 mg ⁄g to
toluene-water-isopropanol mixture and the end point is deter-
0.100 mg ⁄g KOH.
mined when a green/green brown color is obtained using the
1.2 The values stated in SI units are to be regarded as
specified p-naphtholbenzein indicator solution.
standard. No other units of measurement are included in this
standard. 4. Summary of Test Method
1.3 This standard does not purport to address all of the 4.1 The sample is dissolved in a mixture of toluene and
safety concerns, if any, associated with its use. It is the
isopropyl alcohol containing a small amount of water. The
responsibility of the user of this standard to establish appro- resulting single phase solution is blanketed by a stream of
priate safety and health practices and determine the applica-
nitrogen bubbling through it and is titrated with standard
bility of regulatory limitations prior to use. alcoholic potassium hydroxide to the end point indicated by the
1.4 This international standard was developed in accor-
color change (orange in acid and green in base) of the added
dance with internationally recognized principles on standard- p-naphtholbenzein solution.
ization established in the Decision on Principles for the
5. Significance and Use
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 5.1 Some acids can be present in aviation turbine fuels due
Barriers to Trade (TBT) Committee. either to the acid treatment during the refining process or to
naturally occurring organic acids. Significant acid contamina-
2. Referenced Documents
tion is not likely to be present because of the many check tests
2
made during the various stages of refining. However, trace
2.1 ASTM Standards:
amounts of acid can be present and are undesirable because of
D664 Test Method for Acid Number of Petroleum Products
the consequent tendencies of the fuel to corrode metals that it
by Potentiometric Titration
D1193 Specification for Reagent Water contacts or to impair the water separation characteristics of the
aviation turbine fuel.
3. Terminology
5.2 This test method is designed to measure the levels of
3.1 Definitions:
acidity that can be present in aviation turbine fuel and is not
3.1.1 acid number, n—the quantity of a specified base,
suitable for determining significant acid contamination.
expressed in milligrams of potassium hydroxide per gram of
6. Apparatus
6.1 Buret—A 25 mL buret graduated in 0.1 mL
1
This test method is under the jurisdiction of ASTM Committee D02 on
subdivisions, or a 10 mL buret graduated in 0.05 mL subdivi-
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.06 on Analysis of Liquid Fuels and Lubricants.
sions.
Current edition approved May 1, 2017. Published June 2017. Originally
NOTE 1—An automated buret capable of delivering titrant amounts in
approved in 1973. Last previous edition approved in 2011 as D3242 – 11. DOI:
10.1520/D3242-11R17. 0.05 mL or smaller increments can be used, but the stated precision data
This test method has been approved by the sponsoring committees and accepted were obtained using manual burets only.
by the cooperating societies in accordance with established procedures.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 7. Reagents and Materials
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.1 Purity of Reagents—Reagent grade chemicals shall be
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. used in all tests. Unless otherwise indicated, it is intended that
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D3242 − 11 (2017)
all reagents shall conform to the specifications of the Commit-
tee on Analytical Reagents of the American Chemical Society,
3
where such specific
...
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: D3242 − 11 D3242 − 11 (Reapproved 2017)
Designation: 354/98
Standard Test Method for
1
Acidity in Aviation Turbine Fuel
This standard is issued under the fixed designation D3242; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*Scope
1.1 This test method covers the determination of the acidity in aviation turbine fuel in the range from 0.0000.000 mg ⁄g to
0.1000.100 mg mg KOH/g.⁄g KOH.
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.
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:
D664 Test Method for Acid Number of Petroleum Products by Potentiometric Titration
D1193 Specification for Reagent Water
3. Terminology
3.1 Definitions:
3.1.1 acid number, n—the quantity of a specified base, expressed in milligrams of potassium hydroxide per gram of sample,
required to titrate a sample in a specified solvent to a specified endpoint using a specified detection system.
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
D02.06 on Analysis of Liquid Fuels and Lubricants.
Current edition approved May 1, 2011May 1, 2017. Published July 2011June 2017. Originally approved in 1973. Last previous edition approved in 20082011 as
D3242D3242 – 11.–08. DOI: 10.1520/D3242-11.10.1520/D3242-11R17.
This test method has been approved by the sponsoring committees and accepted by the cooperating societies in accordance with established procedures.
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.
3.1.1.1 Discussion—
in this test method, the solvent is a toluene-water-isopropanol mixture and the end point is determined when a green/green brown
color is obtained using the specified p-naphtholbenzein indicator solution.
4. Summary of Test Method
4.1 The sample is dissolved in a mixture of toluene and isopropyl alcohol containing a small amount of water. The resulting
single phase solution is blanketed by a stream of nitrogen bubbling through it and is titrated with standard alcoholic potassium
hydroxide to the end point indicated by the color change (orange in acid and green in base) of the added p-naphtholbenzein
solution.
*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 ----------------------
D3242 − 11 (2017)
5. Significance and Use
5.1 Some acids can be present in aviation turbine fuels due either to the acid treatment during the refining process or to naturally
occurring organic acids. Significant acid contamination is not likely to be present because of the many check tests made during
the various stages of refining. However, trace amounts of acid can be present and are undesirable because of the consequent
tendencies of the fuel to corrode metals that it contacts or to impair the water separation characteristics of the aviation turbine fuel.
5.2 This test method is designed to measure the levels of acidity that can be present in aviation turbine fuel and is not suitable
for determining significant acid contamination.
6. Apparatus
6.1 Buret—A 25-mL25 mL buret graduated in 0.1-mL0.1 mL subdivisions, or a 10-mL10 mL buret graduated in 0.05-
mL0.05 mL subdivisions.
NOTE 1—An automated buret capable of delivering
...
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