ASTM D6229-01
(Test Method)Standard Test Method for Trace Benezene in Hydrocarbon Solvents by Capillary Gas Chromatography
Standard Test Method for Trace Benezene in Hydrocarbon Solvents by Capillary Gas Chromatography
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 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.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D6229–01
Standard Test Method for
Trace Benzene in Hydrocarbon Solvents by Capillary Gas
1
Chromatography
This standard is issued under the fixed designation D 6229; 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* lighter components then pass through a second capillary
column with bounded polar phase where the aromatic and
1.1 This test method covers the determination by capillary
nonaromatic components are separated. The eluted compo-
gas chromatography of trace benzene in hydrocarbon solvents
nents are detected by a flame ionization detector, and the peak
at levels from 1.0 to 2400 vppm.
areas are integrated electronically. The concentration of ben-
NOTE 1—Lower levels of benzene may be determined by this test
zene is calculated by a data processor using a response factor
method. However the gas chromatography (GC) will have to be modified
determined by external standard technique.
from those specified in this test method. The precision of the method may
not apply to these lower benzene levels.
4. Significance and Use
1.2 For hazard information and guidance, see the supplier’s
4.1 This test method is similar to Test Method D 4367 with
Material Safety Data Sheet.
the exception that capillary columns are used and intended for
1.3 The values stated in SI units are to be regarded as the
trace level of benzene in hydrocarbon solvents. The need for
statement. The values in parenthesis are given for information
trace benzene analysis in hydrocarbon solvents arose because
only and are not necessarily the exact equivalent of the SI unit
of the increase of more stringent regulation of benzene level in
values.
these materials.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Apparatus
responsibility of the user of this standard to establish appro-
5.1 Chromatograph—Any gas chromatographic instrument
priate safety and health practices and determine the applica-
that has a backflush system operated by a switching valve
bility of regulatory limitations prior to use.
automatically, flame ionization detector, and can be operated at
the conditions given in Table 1.
2. Referenced Documents
5.2 Detector—The flame ionization detector shall have
2.1 ASTM Standards:
sufficient sensitivity to detect 0.1 vppm of benzene at a peak
D 4367 Test Method for Benzene in Hydrocarbon Solvents
height of 3 times the noise level.
2
by Gas Chromatography
5.3 Columns—one 2–m (6.5–ft), 0.53 mm inside diameter
3
E 300 Practice for Sampling Industrial Chemicals
fused silica capillary with 5-µm thick bounded methyl silicone
column and one 30–m (98.5–ft), 0.53-mm inside diameter
3. Summary of Test Method
fused silica capillary with 0.5-µm thick bounded polyethylene
3.1 A given volume of the sample is introduced into a gas
glycol column.
chromatograph equipped with two capillary columns con-
5.4 Switching Valve—A6–port switching valve 175°C (347
nected in series by switching valve. The specimen passes first
°F) maximum temperature, housed in a separate, temperature-
through a short capillary column with a bounded nonpolar
controlled oven, that can be activated automatically by the gas
phase where the components are separated by boiling point.
chromatograph.
After octane has eluted from the first column, the components
5.5 Sample Inlet System—The sample inlet system shall be
heavier than octane are back-flushed to vent. The octane and
capable of split injection typically at a 1:10 split ratio.
NOTE 2—An auto injector was used in the generation of the repeatabil-
1
This test method is under the jurisdiction of ASTM CommitteeD01 on Paint ity value of this test method, and is recommended. Manual injection with
and Related Coatings, Materials, andApplications, and is the direct responsibility of
a syringe is acceptable; however, the observed precision may not apply.
Subcommittee01.35 on Solvents, Plasticizers, and Chemical Intermediates.
5.6 Data Acquisition System:
Current edition approved June 10, 2001. Published August 2001. Originally
published as D 6229 – 98. Last previous edition D 6229 – 98. 5.6.1 Recorder—A 0 to 1 mv range recorder or equivalent,
2
Annual Book of ASTM Standards, Vol. 06.04.
with a full-scale response time of 2 s shall be used.
3
Annual Book of ASTM Standards, Vol. 15.05.
*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 ----------------------
D6229–01
TABLE 1 Instrument
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.