ASTM D3606-06
(Test Method)Standard Test Method for Determination of Benzene and Toluene in Finished Motor and Aviation Gasoline by Gas Chromatography
Standard Test Method for Determination of Benzene and Toluene in Finished Motor and Aviation Gasoline by Gas Chromatography
SCOPE
1.1 This test method covers the determination of benzene and toluene in finished motor and aviation gasolines by gas chromatography.
1.2 Benzene can be determined between the levels of 0.1 and 5 volume % and toluene can be determined between the levels of 2 and 20 volume %.
1.3 The precision for this test method was determined using conventional gasoline as well as gasolines containing oxygenates (ethers such as methyl tert-butyl ether, ethyl tert-butylether and tert-amylmethylether).
1.4 It has been determined that this test method is not applicable to gasolines containing ethanol. Methanol may also cause interference.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 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.
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An American National Standard
Designation: D 3606 – 06
Standard Test Method for
Determination of Benzene and Toluene in Finished Motor
1
and Aviation Gasoline by Gas Chromatography
This standard is issued under the fixed designation D 3606; 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. Scope* E 969 Specification for Glass Volumetric (Transfer) Pipets
E 1044 Specification for Glass Serological Pipets (General
1.1 This test method covers the determination of benzene
Purpose and Kahn)
and toluene in finished motor and aviation gasolines by gas
E 1293 Specification for Glass Measuring Pipets
chromatography.
1.2 Benzene can be determined between the levels of 0.1
3. Summary of Test Method
and 5 volume % and toluene can be determined between the
3.1 An internal standard, methyl ethyl ketone (MEK), is
levels of 2 and 20 volume %.
added to the sample which is then introduced into a gas
1.3 The precision for this test method was determined using
chromatograph equipped with two columns connected in
conventional gasoline as well as gasolines containing oxygen-
series.The sample passes first through a column packed with a
ates (ethers such as methyl tert-butyl ether, ethyl tert-
nonpolar phase such as dimethylpolysiloxane (8.1.1) which
butylether and tert-amylmethylether).
separates the components according to boiling point. After
1.4 It has been determined that this test method is not
octane has eluted, the flow through the nonpolar column is
applicable to gasolines containing ethanol. Methanol may also
reversed, flushing out the components heavier than octane.The
cause interference.
octane and lighter components then pass through a column
1.5 The values stated in SI units are to be regarded as the
packed with a highly polar phase such as 1,2,3-tris(2-
standard. The values given in parentheses are for information
cyanoethoxy)propane(8.1.2)whichseparatesthearomaticand
only.
nonaromatic compounds. The eluted components are detected
1.6 This standard does not purport to address all of the
by a thermal conductivity detector. The detector response is
safety concerns, if any, associated with its use. It is the
recorded,thepeakareasaremeasured,andtheconcentrationof
responsibility of the user of this standard to establish appro-
each component is calculated with reference to the internal
priate safety and health practices and determine the applica-
standard.
bility of regulatory limitations prior to use.
4. Significance and Use
2. Referenced Documents
2 4.1 Benzene is classed as a toxic material. A knowledge of
2.1 ASTM Standards:
the concentration of this compound can be an aid in evaluating
D 4057 Practice for Manual Sampling of Petroleum and
the possible health hazard to persons handling and using the
Petroleum Products
gasoline. This test method is not intended to evaluate such
E 694 Specification for Laboratory Glass VolumetricAppa-
hazards.
ratus
5. Apparatus
1
5.1 Chromatograph—Any chromatographic instrument that
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
has a backflush system and thermal conductivity detector, and
D02.04 on Hydrocarbon Analysis.
that can be operated at the conditions given in Table 1, can be
Current edition approved May 1, 2006. Published June 2006. Originally
employed. Two backflush systems are shown. Fig. 1 is a
approved in 1977. Last previous edition approved in 2004 as D 3606–04a.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or pressure system and Fig. 2 is a switching valve system. Either
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
one can be used.
Standards volume information, refer to the standard’s Document Summary page on
5.2 Columns:
the ASTM website.
*A Summary of Changes section appears at the end of this standard.
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D3606–06
TABLE 1 Instrument Parameters
5.13 Burets, automatic, with integral reservoir, 25-mL ca-
Detector thermal conductivity pacity.
Columns: two, stainless steel
Length, m (A) 0.8; (B) 4.6
6. Materials
Outside diameter, mm 3.2
Stationary phase (A) dimethylpolysiloxane, 10 mass %
6.1 Carrier Gas—Helium, 99.99 % pure. (Warning—
(B) TCEP, 20 mass %
Compressed gas under high pressure.)
Support (A) Chromosorb W, 60 to 80-mesh
6.2 Support—Crushed firebrick, acid-washed, 60 to 80-
(B) Chromosorb P, 80 to 100-mesh
Reference column Any column or
...
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