ASTM D4053-04
(Test Method)Standard Test Method for Benzene in Motor and Aviation Gasoline by Infrared Spectroscopy
Standard Test Method for Benzene in Motor and Aviation Gasoline by Infrared Spectroscopy
SIGNIFICANCE AND USE
Benzene is classed as a toxic material. A knowledge of the concentration of this compound may be an aid in evaluating the possible health hazard to persons handling and using the gasoline. This test method is not intended to evaluate such hazards.
SCOPE
1.1 This test method covers the determination of the percent benzene in full-range gasoline. It is applicable to concentrations from 0.1% to 5 volume %.
1.2 The values in SI units are regarded as the standard.
1.3 This test method has not been validated for gasolines containing oxygenates.
1.4 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 Section 8 and 9.1.
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Standards Content (Sample)
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An American National Standard
Designation:D4053–04
Standard Test Method for
Benzene in Motor and Aviation Gasoline by Infrared
1
Spectroscopy
This standard is issued under the fixed designation D4053; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope* 3.1.1 Definitions of terms and symbols relating to absorp-
tion spectroscopy in this test method shall conform to Termi-
1.1 Thistestmethodcoversthedeterminationofthepercent
nology E131. Terms of particular significance are the follow-
benzene in full-range gasoline. It is applicable to concentra-
ing:
tions from 0.1% to 5 volume %.
3.1.2 absorbance, A, n—the molecular property of a sub-
1.2 This test method has not been validated for gasolines
stance that determines its ability to take up radiant power,
containing oxygenates. Certain oxygenates interfere with the
expressed by:
measurement described in this test method. Test Method
D6277 is recommended for gasolines containing oxygenates.
A 5log ~1/T!52log T (1)
10 10
1.3 The values in SI units are regarded as the standard.
where
1.4 This standard does not purport to address all of the
T = the transmittance as defined in 3.1.5.
safety concerns, if any, associated with its use. It is the
3.1.3 radiant energy, n—energy transmitted as electromag-
responsibility of the user of this standard to establish appro-
netic waves.
priate safety and health practices and determine the applica-
3.1.4 radiant power, P, n—the rate at which energy is
bility of regulatory limitations prior to use. For specific
transported in a beam of radiant energy.
warning statements, see Section 8 and 9.1.
3.1.5 transmittance, T, n—the molecular property of a
substance that determines its transportability of radiant power,
2. Referenced Documents
2 expressed by:
2.1 ASTM Standards:
T 5 P/P (2)
D4057 Practice for Manual Sampling of Petroleum and
o
Petroleum Products
where:
D6277 Test Method for Determination of Benzene in
P = the radiant power passing through the sample, and
Spark-Ignition Engine Fuels Using Mid Infrared Spectros-
P = the radiant power incident upon the sample.
o
copy
E131 Terminology Relating to Molecular Spectroscopy
4. Summary of Test Method
E932 Practice for Describing and Measuring Performance
4.1 Asample of gasoline is examined by infrared spectros-
of Dispersive Infrared Spectrophotometers
copy and, following a correction for interference, compared
E1421 PracticeforDescribingandMeasuringPerformance
with calibration blends of known benzene concentration. From
of Fourier Transform Mid-Infrared (FT-MIR) Spectrom-
this comparison the amount of benzene in the gasoline is
eters: Level Zero and Level One Tests
determined.
3. Terminology
5. Significance and Use
3.1 Definitions:
5.1 Benzene is classed as a toxic material. A knowledge of
theconcentrationofthiscompoundmaybeanaidinevaluating
the possible health hazard to persons handling and using the
1
This test method is under the jurisdiction of ASTM Committee D02 on
gasoline. This test method is not intended to evaluate such
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
hazards.
D02.04 on Hydrocarbon Analysis.
Current edition approved Nov. 1, 2004. Published November 2004. Originally
6. Interferences
approved in 1981. Last previous edition approved in 2003 as D4053–98(2003).
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.1 Toluene and heavier aromatic compounds have some
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
interference in this test method. In order to minimize the effect
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. of such interference, this test method includes a procedure that
*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
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D4053–04
corrects for the error caused by the presence of toluene. Error determine three absorbance values: (1) at the point of maxi-
−1
due to other sources of interference may be partially compen- mum absorbance near 673 cm (14.86 µm), designated the
satedforbycalibratingwithgasolinestockscontaininglittleor benzene band; (2) at the point of maximum absorbance near
−1
nobenzenebutwhichotherwisearesimilarinaromaticcontent 460 cm (21.74 µm), designated the toluene band; and (3)at
−1
to the samples to be analyzed. 500 cm (20.00 µm), designated the baseline position.
10.3.2 Following the steps of Section 1
...
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