ASTM D6229-06(2010)
(Test Method)Standard Test Method for Trace Benzene in Hydrocarbon Solvents by Capillary Gas Chromatography
Standard Test Method for Trace Benzene in Hydrocarbon Solvents by Capillary Gas Chromatography
SIGNIFICANCE AND USE
This test method is similar to Test Method D4367 with the exception that capillary columns are used and intended for trace level of benzene in hydrocarbon solvents. The need for trace benzene analysis in hydrocarbon solvents arose because of the increase of more stringent regulation of benzene level in these materials.
SCOPE
1.1 This test method covers the determination by capillary gas chromatography of trace benzene in hydrocarbon solvents at levels from 1.0 to 2400 vppm.
Note 1—Lower levels of benzene may be determined by this test method. However the gas chromatography (GC) will have to be modified from those specified in this test method. The precision of the method may not apply to these lower benzene levels.
1.2 For hazard information and guidance, see the supplier's Material Safety Data Sheet.
1.3 The values stated in SI units are to be regarded as the statement. The values in parenthesis are given for information only and are not necessarily the exact equivalent of the SI unit values.
1.4 For purposes of determining conformance of an observed or a calculated value using this test method to relevant specifications, test result(s) shall be rounded off “to the nearest unit” in the last right-hand digit used in expressing the specification limit, in accordance with Practice E29.
1.5 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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Designation: D6229 − 06 (Reapproved 2010)
Standard Test Method for
Trace Benzene in Hydrocarbon Solvents by Capillary Gas
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Chromatography
This standard is issued under the fixed designation D6229; 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* 2.2 ASTM Adjuncts:
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D2PP Determination of Precision and Bias Data
1.1 This test method covers the determination by capillary
gas chromatography of trace benzene in hydrocarbon solvents
3. Summary of Test Method
at levels from 1.0 to 2400 vppm.
3.1 A given volume of the sample is introduced into a gas
NOTE 1—Lower levels of benzene may be determined by this test
chromatograph equipped with two capillary columns con-
method. However the gas chromatography (GC) will have to be modified
nected in series by switching valve. The specimen passes first
from those specified in this test method. The precision of the method may
not apply to these lower benzene levels.
through a short capillary column with a bounded nonpolar
phase where the components are separated by boiling point.
1.2 For hazard information and guidance, see the supplier’s
After octane has eluted from the first column, the components
Material Safety Data Sheet.
heavier than octane are back-flushed to vent. The octane and
1.3 The values stated in SI units are to be regarded as the
lighter components then pass through a second capillary
statement. The values in parenthesis are given for information
column with bounded polar phase where the aromatic and
only and are not necessarily the exact equivalent of the SI unit
nonaromatic components are separated. The eluted compo-
values.
nents are detected by a flame ionization detector, and the peak
1.4 For purposes of determining conformance of an ob-
areas are integrated electronically. The concentration of ben-
served or a calculated value using this test method to relevant
zene is calculated by a data processor using a response factor
specifications, test result(s) shall be rounded off “to the nearest
determined by external standard technique.
unit” in the last right-hand digit used in expressing the
specification limit, in accordance with Practice E29.
4. Significance and Use
1.5 This standard does not purport to address all of the
4.1 This test method is similar to Test Method D4367 with
safety concerns, if any, associated with its use. It is the
the exception that capillary columns are used and intended for
responsibility of the user of this standard to establish appro-
trace level of benzene in hydrocarbon solvents. The need for
priate safety and health practices and determine the applica-
trace benzene analysis in hydrocarbon solvents arose because
bility of regulatory limitations prior to use.
of the increase of more stringent regulation of benzene level in
these materials.
2. Referenced Documents
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2.1 ASTM Standards:
5. Apparatus
D4367 Test Method for Benzene in Hydrocarbon Solvents
5.1 Chromatograph—Any gas chromatographic instrument
by Gas Chromatography
that has a backflush system operated by a switching valve
E29 Practice for Using Significant Digits in Test Data to
automatically, flame ionization detector, and can be operated at
Determine Conformance with Specifications
the conditions given in Table 1.
E300 Practice for Sampling Industrial Chemicals
5.2 Detector—The flame ionization detector shall have suf-
ficient sensitivity to detect 0.1 vppm of benzene at a peak
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This test method is under the jurisdiction of ASTM Committee D01 on Paint
height of 3 times the noise level.
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.35 on Solvents, Plasticizers, and Chemical Intermediates
5.3 Columns—one 2–m (6.5–ft), 0.53 mm inside diameter
Current edition approved Dec. 1, 2010. Published December 2010. Originally
fused silica capillary with 5-µm thick bounded methyl silicone
approved in 1998. Last previous edition approved in 2006 as D6229 – 06. DOI:
10.1520/D6229-06R10.
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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
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Standards volume information, refer to the standard’s Document Summary page on Available from ASTM International Headquarters. Order Adjunct No.
the ASTM website. ADJD6300.
*A Summary of Changes section appears at the end of this standard
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D6229 − 06 (2010)
TABLE 1 Instrument Conditions Found Satisfactory for
8. Prep
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