ASTM D3703-07e1
(Test Method)Standard Test Method for Hydroperoxide Number of Aviation Turbine Fuels, Gasoline and Diesel Fuels
Standard Test Method for Hydroperoxide Number of Aviation Turbine Fuels, Gasoline and Diesel Fuels
SIGNIFICANCE AND USE
The magnitude of the hydroperoxide number is an indication of the quantity of oxidizing constituents present. Deterioration of the fuels results in the formation of hydroperoxides and other oxygen-carrying compounds. The hydroperoxide number measures those compounds that will oxidize potassium iodide.
The determination of the hydroperoxide number of aviation turbine fuels, gasoline and diesel is significant because of the adverse effect of hydroperoxide upon certain elastomers in the fuel systems.
5.3 The determination of hydroperoxide number of gasoline is significant because hydroperoxides have been demonstrated to decrease both Research and Motor Octane Numbers. In addition, hydroperoxides have adverse effects on certain fuel system components.
5.4 The determination of hydroperoxide number of diesel fuel is significant because hydroperoxides have been demonstrated to increase the Cetane Number. In addition, hydroperoxides have adverse effects on certain fuel system components.
SCOPE
1.1 This test method covers the determination of the hydroperoxide content expressed as hydroperoxide number of aviation turbine, gasoline and diesel fuels.
1.2 The range of hydroperoxide number included in the precision statement is 0 to 50 mg/kg active oxygen as hydroperoxide.
1.3 The interlaboratory study to establish the precision of this test method consisted of spark-ignition engine fuels (regular, premium and California Cleaner-Burning gasoline), aviation gasoline, jet fuel, ultra low sulfur diesel, and biodiesel. However, biodiesel was not included in the precision calculation because of the large differences in results within labs and between labs.
1.4 This test method detects hydroperoxides such as t-butyl hydroperoxide and cumene hydroperoxide. It does not detect sterically-hindered hydroperoxides such as dicumyl and di-t-butyl hydroperoxides
1.5 Di-alkyl hydroperoxides added commercially to diesel fuels are not detected by this test method.
1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.7 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 consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see 7.3, 7.6, 9.2, and Annex A1.
General Information
Relations
Standards Content (Sample)
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Designation: D3703 − 07
Standard Test Method for
Hydroperoxide Number of Aviation Turbine Fuels, Gasoline
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and Diesel Fuels
This standard is issued under the fixed designation D3703; 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 Department of Defense.
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´ NOTE—Clarified notation of X in Section 13 editorially in November 2009.
1. Scope* 2. Referenced Documents
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2.1 ASTM Standards:
1.1 This test method covers the determination of the hy-
droperoxide content expressed as hydroperoxide number of D1193 Specification for Reagent Water
D4057 Practice for Manual Sampling of Petroleum and
aviation turbine, gasoline and diesel fuels.
Petroleum Products
1.2 The range of hydroperoxide number included in the
D6447 Test Method for Hydroperoxide Number of Aviation
precision statement is 0 to 50 mg/kg active oxygen as hydrop-
Turbine Fuels by Voltammetric Analysis
eroxide.
2.2 Other Standards:
1.3 The interlaboratory study to establish the precision of
CRC Report No. 559 Determination of the Hydroperoxide
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this test method consisted of spark-ignition engine fuels
Potential of Jet Fuels
(regular, premium and California Cleaner-Burning gasoline),
4500-C1 B. Iodometric Method I—Standard Methods for
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aviationgasoline,jetfuel,ultralowsulfurdiesel,andbiodiesel.
the Examination of Water and Wastewater
However, biodiesel was not included in the precision calcula-
3. Terminology
tion because of the large differences in results within labs and
between labs.
3.1 Definitions of Terms Specific to This Standard:
3.1.1 hydroperoxide, n—organic peroxide having the gener-
1.4 This test method detects hydroperoxides such as t-butyl
alized formula ROOH.
hydroperoxide and cumene hydroperoxide. It does not detect
3.1.1.1 Discussion—This test method detects hydroperox-
sterically-hindered hydroperoxides such as dicumyl and di-t-
idessuchast-butylhydroperoxide[(CH ) COOH]andcumene
3 3
butyl hydroperoxides
hydroperoxide [C H C(CH ) OOH]. It does not detect
6 5 3 2
1.5 Di-alkyl hydroperoxides added commercially to diesel
sterically-hindered hydroperoxides such as dicumyl and di-t-
fuels are not detected by this test method.
butyl hydroperoxides.
1.6 The values stated in SI units are to be regarded as the
3.1.2 hydroperoxide number, n—an indication of the quan-
standard. The values given in parentheses are for information
tity of oxidizing constituents present in certain liquid fuels as
only.
determined by this test method.
3.1.2.1 Discussion—The higher the quantity of oxidizing
1.7 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the constituents in the fuels, the higher the hydroperoxide number.
responsibility of the user of this standard to consult and
4. Summary of Test Method
establish appropriate safety and health practices and deter-
4.1 A quantity of sample dissolved in 2,2,4-
mine the applicability of regulatory limitations prior to use.
trimethylpentane is contacted with aqueous potassium iodide
For specific warning statements, see 7.3, 7.6, 9.2, and Annex
A1.
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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
Standards volume information, refer to the standard’s Document Summary page on
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This test method is under the jurisdiction of ASTM Committee D02 on the ASTM website.
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Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee Available from the Coordinating Research Council, Inc., 219 Perimeter Center
D02.05 on Properties of Fuels, Petroleum Coke and Carbon Material. Parkway, Atlanta, GA 30346.
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Current edition approved Dec. 1, 2007. Published January 2008. Originally Published by the American Health Assoc., the American Water Works Assoc.
approved in 1978. Last previous edition approved in 2004 as D3703–99(2004). and Water Environment Federation. Available from American Public Health
DOI: 10.1520/D3703-07E01. Publication Sales, P. O. Box 753, Waldorf, MD 20604–0753.
*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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D3703 − 07
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solution. The hydroperoxides present are reduced by the where such specifications are available. Other grades may be
potassium iodide.An equivalent amount of iodine is liberated, used, provided it is first ascertained that the reagent is of
which is titrated with an aqueous sodium thiosulfate solution. sufficiently high purity to permit its use without lessening the
The results are calculated as milligrams of hydroperoxide pe
...
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