ASTM D3798-03
(Test Method)Standard Test Method for Analysis of p-Xylene by Gas Chromatography (Withdrawn 2009)
Standard Test Method for Analysis of <i>p</i>-Xylene by Gas Chromatography (Withdrawn 2009)
SIGNIFICANCE AND USE
This test method is suitable for setting specifications on p-xylene and for use as an internal quality control tool where p-xylene is produced or is used in a manufacturing process. It may also be used in development or research work involving p-xylene. It is generally applied to determining those commonly occurring impurities such as nonaromatic hydrocarbons, benzene, toluene, ethylbenzene, m-xylene, o-xylene, and cumene (isopropylbenzene).
Purity is commonly reported by subtracting the determined expected impurities from 100.00. However, a gas chromatographic analysis cannot determine absolute purity if unknown components are contained within the material being examined. Refer to Specification D 5136 for determining other chemical and physical properties of p-xylene.
SCOPE
1.1 This test method covers the determination of known hydrocarbon impurities in, and the purity of p-xylene by gas chromatography (GC). It is generally meant for the analysis of p-xylene of 99 % or greater purity. Impurity concentrations that can be measured range from 0.001 to 1.000 weight %.
1.2 The following applies to all specified limits in this test method: for purposes of determining conformance with this test method, an observed value or a calculated value shall be rounded off 'to the nearest unit' in the right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E 29.
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 a specific hazard statement, see Section 9.
WITHDRAWN RATIONALE
This test method covers the determination of known hydrocarbon impurities in, and the purity of p-xylene by gas chromatography (GC). It is generally meant for the analysis of p-xylene of 99 % or greater purity. Impurity concentrations that can be measured range from 0.001 to 1.000 weight %.
Formerly under the jurisdiction of Committee D16 on Aromatic Hydrocarbons and Related Chemicals, this test method was withdrawn in June 2009 and replaced by Test Method D 5917 for Trace Impurities in Monoclyclic Aromatic Hydrocarbons by Gas Chromatography and External Calibration and Test Method D 7504 for Trace Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effective Carbon Number.
General Information
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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:D3798–03
Standard Test Method for
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Analysis of p-Xylene by Gas Chromatography
This standard is issued under the fixed designation D3798; 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* E1510 Practice for Installing Fused Silica Open Tubular
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Capillary Columns in Gas Chromatographs
1.1 This test method covers the determination of known
2.2 Other Document:
hydrocarbon impurities in, and the purity of p-xylene by gas
OSHA Regulations, 29 CFR, paragraphs 1910.1000 and
chromatography (GC). It is generally meant for the analysis of
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1910.1200
p-xyleneof99%orgreaterpurity.Impurityconcentrationsthat
can be measured range from 0.001 to 1.000 weight %.
3. Terminology
1.2 The following applies to all specified limits in this test
3.1 Definitions:
method: for purposes of determining conformance with this
3.1.1 For definition of terms used in this test method see
test method, an observed value or a calculated value shall be
Terminology D4790.
rounded off 8to the nearest unit’ in the right-hand digit used in
expressing the specification limit, in accordance with the
4. Summary of Test Method
rounding-off method of Practice E29.
4.1 A known amount of an internal standard is added to a
1.3 This standard does not purport to address all of the
specimen of p-xylene. The prepared specimen is mixed and
safety concerns, if any, associated with its use. It is the
analyzed by a gas chromatograph equipped with a flame
responsibility of the user of this standard to establish appro-
ionization detector (FID). The peak area of each impurity and
priate safety and health practices and determine the applica-
theinternalstandardismeasured.Theamountofeachimpurity
bility of regulatory limitations prior to use. For a specific
is calculated from the ratio of the peak area of the internal
hazard statement, see Section 9.
standard versus the peak area of the impurity. Purity by GC
(the p-xylene content) is calculated by subtracting the sum of
2. Referenced Documents
the impurities found from 100.00. Results are reported in
2.1 ASTM Standards:
weight percent.
D3437 Practice for Sampling and Handling Liquid Cyclic
2
Products
5. Significance and Use
D4790 Terminology of Aromatic Hydrocarbons and Re-
2 5.1 This test method is suitable for setting specifications on
lated Chemicals
p-xylene and for use as an internal quality control tool where
2
D5136 Specification for High Purity p-Xylene
p-xylene is produced or is used in a manufacturing process. It
E29 Practice for Using Significant Digits in Test Data to
may also be used in development or research work involving
3
Determine Conformance with Specifications
3 p-xylene. It is generally applied to determining those com-
E260 Practice for Packed Column Gas Chromatography
monlyoccurringimpuritiessuchasnonaromatichydrocarbons,
E355 Practice for Gas Chromatography Terms and Rela-
3 benzene, toluene, ethylbenzene, m-xylene, o-xylene, and
tionships
cumene (isopropylbenzene).
E691 Practice for Conducting an Interlaboratory Study to
3 5.2 Purity is commonly reported by subtracting the deter-
Determine the Precision of a Test Method
mined expected impurities from 100.00. However, a gas
chromatographic analysis cannot determine absolute purity if
unknown components are contained within the material being
1
This test method is under the jurisdiction of ASTM Committee D16 on
examined. Refer to Specification D5136 for determining other
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
chemical and physical properties of p-xylene.
Subcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their
Derivatives.
Current edition approved June 10, 2003. Published July 2003. Originally
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approved in 1979. Last previous edition approved in 2000 as D3798–00. Annual Book of ASTM Standards, Vol 03.06.
2 5
Annual Book of ASTM Standards, Vol 06.04. Available from Superintendent of Documents, U.S. Government Printing
3
Annual Book of ASTM Standards, Vol 14.02. Office, Washington, DC 20402.
*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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D3798–03
6. Interferences 8. Reagents
8.1 Purity of Reagent—Reagent grade chemicals shall be
6.1 The internal standard chosen must be sufficiently re-
used in all tests. Unless otherwise indicated, it is intended that
solvedfromanyimpurityandthep-xylenepeak.Referto8.4.1.
all reagents shall conform to the specifications of the Commit-
tee onAnalytical
...
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