ASTM D3237-02
(Test Method)Standard Test Method for Lead In Gasoline By Atomic Absorption Spectroscopy
Standard Test Method for Lead In Gasoline By Atomic Absorption Spectroscopy
SCOPE
1.1 This test method covers the determination of the total lead content of gasoline within the concentration range of 0.010 to 0.10 g of lead/U.S. gal (2.5 to 25 mg/L). This test method compensates for variations in gasoline composition and is independent of lead alkyl type.
1.2 The values given in grams per U.S. gallon are to be regarded as the standard in the United States. Note that in other countries, other units can be preferred.
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. For specific hazard statements, see 6.6 and 6.8.
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An American National Standard
Designation:D 3237–02
Standard Test Method for
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Lead In Gasoline By Atomic Absorption Spectroscopy
This standard is issued under the fixed designation D 3237; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 3. Summary of Test Method
1.1 This test method covers the determination of the total 3.1 The gasoline sample is diluted with methyl isobutyl
lead content of gasoline within the concentration range of ketoneandthealkylleadcomponentsarestabilizedbyreaction
0.010 to 0.10 g of lead/U.S. gal (2.5 to 25 mg/L). This test with iodine and a quaternary ammonium salt. The lead content
method compensates for variations in gasoline composition of the sample is determined by atomic absorption flame
and is independent of lead alkyl type. spectrometry at 283.3 nm, using standards prepared from
1.2 The values given in grams per U.S. gallon are to be reagent grade lead chloride. By the use of this treatment, all
regardedasthestandardintheUnitedStates.Notethatinother alkyl lead compounds give identical response.
countries, other units can be preferred.
4. Significance and Use
1.3 This standard does not purport to address all of the
4.1 This test method is used to ensure compliance of trace
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- leadasrequiredbyfederalregulationforlead-freegasoline(40
CFR part 80).
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. For specific hazard
5. Apparatus
statements, see 6.6 and 6.8.
5.1 Atomic Absorption Spectrometer, capable of scale ex-
2. Referenced Documents
pansion and nebulizer adjustment, and equipped with a slot
burnerandpremixchamberforusewithanair-acetyleneflame.
2.1 ASTM Standards:
2
D 1193 Specification for Reagent Water 5.2 Volumetric Flasks, 50-mL, 100-mL, 250-mL, and 1-L
D 1368 Test Method for Trace Concentrations of Lead in sizes.
3
5.3 Pipets, 2-mL, 5-mL, 10-mL, 20-mL, and 50-mL sizes.
Primary Reference Fuels
D 2550 TestMethodforWaterSeparationCharacteristicsof 5.4 Micropipet, 100-µL, Eppendorf type or equivalent.
4
Aviation Turbine Fuels
6. Reagents
D 3116 Test Method for Trace Amounts of Lead in Gaso-
5
6.1 Purity of Reagents—Reagent grade chemicals shall be
line
used in all tests. Unless otherwise indicated, it is intended that
D 4057 Practice for Manual Sampling of Petroleum and
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all reagents shall conform to the specifications of the Commit-
Petroleum Products
tee onAnalytical Reagents of theAmerican Chemical Society,
D 6299 Practice for Applying Statistical Quality Assurance
8
where such specifications are available.
Techniques to Evaluate Analytical Measurement System
7
6.2 Purity of Water—Unless otherwise indicated, references
Performance
to water shall be understood to mean reagent water as defined
by Types II or III of Specification D 1193.
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This test method is under the jurisdiction of ASTM Committee D02 on
6.3 Aliquat 336 (tricapryl methyl ammonium chloride).
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.03 on Elemental Analysis.
Current edition approved Nov. 10, 2002. Published January 2003. Originally
approved in 1973. Last previous edition approved in 1997 as D 3237–97.
2 8
Annual Book of ASTM Standards, Vol 11.01. Reagent Chemicals, American Chemical Society Specifications, American
3
Annual Book of ASTM Standards, Vol 05.01. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
4
Discontinued; see 1988 Annual Book of ASTM Standards, Vol 05.02. listed by the American Chemical Society, see Annual Standards for Laboratory
5
Discontinued; see 1993 Annual Book of ASTM Standards, Vol 05.02. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
6
Annual Book of ASTM Standards, Vol 05.02. and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
7
Annual Book of ASTM Standards, Vol 05.03. MD.
*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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D 3237–02
6.4 Aliquat 336/MIBK Solution (10 % volume per mLof lead-free gasoline. In the case of the blank, add only 5.0
volume)—Dissolve and dilute 100 mL (88.0 g) of Aliquat 336 mL of lead-free gasoline.
with MIBK to 1 L. 8.1.2 Addimmediately0.1mLofiodine/toluenesolution
...
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