ASTM D3348-07
(Test Method)Standard Test Method for Rapid Field Test for Trace Lead in Unleaded Gasoline (Colorimetric Method)
Standard Test Method for Rapid Field Test for Trace Lead in Unleaded Gasoline (Colorimetric Method)
SIGNIFICANCE AND USE
This test is used to determine trace quantities of lead in unleaded gasoline. Unwarranted amounts of lead may cause deposits in automotive pollution control equipment and poisoning of catalytic mufflers.
SCOPE
1.1 This test method covers and is intended for use in the field by nontechnical people for the quantitative measurement of lead in unleaded gasoline in the range from 0.01 to 0.10 g Pb/U.S. gal (2.64 to 26.4 mg Pb/L). This method applies to all commercial gasolines and responds to all types of lead alkyls as well as to other organic and inorganic forms of lead.
Note 1—This test method is based on the use of the Mobil Lead Test Kit (Fig. 1).
Note 2—This test method is a screening test and is not to be used as a replacement for withdrawn Test Method D 3116, withdrawn Test Method D 3229, or Test Method D 3237.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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 warning statements, see Section 7.
FIG. 1 Mobil Lead Test Kit
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Designation: D3348 − 07
StandardTest Method for
Rapid Field Test for Trace Lead in Unleaded Gasoline
1
(Colorimetric Method)
This standard is issued under the fixed designation D3348; 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* D6299 Practice for Applying Statistical Quality Assurance
and Control Charting Techniques to Evaluate Analytical
1.1 This test method covers and is intended for use in the
Measurement System Performance
field by nontechnical people for the quantitative measurement
D6792 Practice for Quality System in Petroleum Products
of lead in unleaded gasoline in the range from 0.01 to 0.10 g
and Lubricants Testing Laboratories
Pb/U.S. gal (2.64 to 26.4 mg Pb/L). This method applies to all
commercial gasolines and responds to all types of lead alkyls
3. Summary of Test Method
as well as to other organic and inorganic forms of lead.
3.1 The gasoline is treated with iodine and tetraethyl am-
NOTE 1—This test method is based on the use of the Mobil Lead Test
monium chloride in chloroform and subjected to ultraviolet
Kit (Fig. 1).
light. The lead alkyls form water-soluble lead alkyl iodides,
NOTE 2—This test method is a screening test and is not to be used as a
which are removed from the gasoline by shaking it with an
replacement for withdrawn Test Method D3116, withdrawn Test Method
D3229, or Test Method D3237. aqueous ammonium nitrate solution. The aqueous extract is
filtered into a solution of 4-(2-pyridylazo)-resorcinol disodium
1.2 The values stated in SI units are to be regarded as
salt (PAR) and ammonium hydroxide. The lead is determined
standard. No other units of measurement are included in this
by measuring its PAR complex colorimetrically at 490 nm
standard.
using a previously prepared calibration curve.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Significance and Use
responsibility of the user of this standard to establish appro-
4.1 This test is used to determine trace quantities of lead in
priate safety and health practices and determine the applica-
unleaded gasoline. Unwarranted amounts of lead may cause
bility of regulatory limitations prior to use. For specific
deposits in automotive pollution control equipment and poi-
warning statements, see Section 7.
soning of catalytic mufflers.
2. Referenced Documents
5. Interferences
2
2.1 ASTM Standards:
5.1 PAR also reacts with many other metals forming highly
D3116 Test Method for TraceAmounts of Lead in Gasoline
coloredcomplexes.However,noneofthesearenormallyfound
3
(Withdrawn 1994)
present in a soluble form in gasoline. The following metals
D3229 Test Method for Low Levels of Lead in Gasoline by
were found to form colors with PAR and if present may
3
X-Ray Spectrometry (Withdrawn 1992)
interfere to give high results: Fe II, Fe III, Co II, Ni II, Cu II,
D3237 TestMethodforLeadinGasolinebyAtomicAbsorp-
Zn II, Cd II, Mn II, Sn II, V IV, Pb II, U VI, Ti IV, and the rare
tion Spectroscopy
earths.
6. Apparatus
1
6.1 Ultraviolet Lamp, long wavelength, 3660 Å, placed in a
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
standard 4-W fluorescent fixture.
D02.03 on Elemental Analysis.
4,5
Current edition approved Dec. 1, 2007. Published January 2008. Originally NOTE 3—A 3-min electric timer is connected to the fixture in the
ϵ1
approved in 1974. Last previous edition approved in 2003 as D3348–98(2003) . prototype kit.
DOI: 10.1520/D3348-07.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM The sole source of supply of the 3–min timer known to the committee at this
Standards volume information, refer to the standard’s Document Summary page on time is H. M. Rhodes, Avon, CT 06001, Catalog No. 90021.
5
the ASTM website. If you are aware of alternative suppliers, please provide this information to
3
The last approved version of this historical standard is referenced on ASTM International Headquarters. Your comments will receive careful consider-
1
www.astm.org. ation at a meeting of the responsible technical committee, which you may attend.
*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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---------------------- Page: 1 ----------------------
D3348 − 07
FIG. 1 Mobil Lead Test Kit
5,7
6.2 Measuring Block, aluminum, drilled to h
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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.
An American National Standard
e1
Designation:D3348–98 (Reapproved 2003) Designation:D3348–07
Standard Test Method for
Rapid Field Test for Trace Lead in Unleaded Gasoline
1
(Colorimetric Method)
This standard is issued under the fixed designation D 3348; 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
e NOTE—Warning notes were editorially moved into the standard text in July 2003.
1. Scope*
1.1 This test method covers and is intended for use in the field by nontechnical people for the quantitative measurement of lead
in unleaded gasoline in the range from 0.01 to 0.10 g Pb/U.S. gal (2.64 to 26.4 mg Pb/L). This method applies to all commercial
gasolines and responds to all types of lead alkyls as well as to other organic and inorganic forms of lead.
NOTE 1—This test method is based on the use of the Mobil Lead Test Kit (Fig. 1).
NOTE 2—This test method is a screening test and is not to be used as a replacement for withdrawn Test Method D 3116, withdrawn Test Method
D 3229, or Test Method D 3237.
1.2The values stated in SI units shall be regarded as standard.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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 warning statements, see Section 7.
2. Referenced Documents
2
2.1 ASTM Standards:
3
D 3116 Test Method for Trace Amounts of Lead in Gasoline
3
D 3229Test Method Method of Test for Low Levels of Lead in Gasoline by X-Ray Spectrometry
D 3237 Test Method for Lead in Gasoline by Atomic Absorption Spectroscopy
D 6299 Practice for Applying Statistical Quality Assurance Techniques to Evaluate Analytical Measurement System
Performance
D 6792 Practice for Quality System in Petroleum Products and Lubricants Testing Laboratories
3. Summary of Test Method
3.1 The gasoline is treated with iodine and tetraethyl ammonium chloride in chloroform and subjected to ultraviolet light. The
lead alkyls form water-soluble lead alkyl iodides, which are removed from the gasoline by shaking it with an aqueous ammonium
nitrate solution. The aqueous extract is filtered into a solution of 4-(2-pyridylazo)-resorcinol disodium salt (PAR) and ammonium
hydroxide. The lead is determined by measuring its PAR complex colorimetrically at 490 nm using a previously prepared
calibration curve.
4. Significance and Use
4.1 Thistestisusedtodeterminetracequantitiesofleadinunleadedgasoline.Unwarrantedamountsofleadmaycausedeposits
in automotive pollution control equipment and poisoning of catalytic mufflers.
5. Interferences
5.1 PAR also reacts with many other metals forming highly colored complexes. However, none of these are normally found
1
This test method is under the jurisdiction ofASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.03 on
Elemental Analysis.
Current edition approved May 10, 2003. Published July 2003. Originally approved in 1974. Last previous edition approved in 1998 as D3348–98.
e1
Current edition approved Dec. 1, 2007. Published January 2008. Originally approved in 1974. Last previous edition approved in 2003 as D 3348–98(2003) .
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 05.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Discontinued. See 1992 Annual Book of ASTM Standards , Vol 05.02.
3
Withdrawn.
*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 ----------------------
D3348–07
FIG. 1 Mobil Lead Test Kit
present in a soluble form in gasoline. The following metals were found to form colors with PAR and if present may interfere to
give high results: Fe II, Fe III, Co II, Ni II, Cu II, Zn II, Cd II, Mn II, Sn II, V IV, Pb II, U VI, Ti IV, and the rare earths.
6. Apparatus
6.1 Ultraviolet Lamp,Lamp
...
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