ASTM D2505-88(2010)
(Test Method)Standard Test Method for Ethylene, Other Hydrocarbons, and Carbon Dioxide in High-Purity Ethylene by Gas Chromatography
Standard Test Method for Ethylene, Other Hydrocarbons, and Carbon Dioxide in High-Purity Ethylene by Gas Chromatography
SIGNIFICANCE AND USE
High-purity ethylene is required as a feedstock for some manufacturing processes, and the presence of trace amounts of carbon dioxide and some hydrocarbons can have deleterious effects. This method is suitable for setting specifications, for use as an internal quality control tool and for use in development or research work.
SCOPE
1.1 This test method covers the determination of carbon dioxide, methane, ethane, acetylene, and other hydrocarbons in high-purity ethylene. Hydrogen, nitrogen, oxygen, and carbon monoxide are determined in accordance with Test Method D2504. The percent ethylene is obtained by subtracting the sum of the percentages of the hydrocarbon and nonhydrocarbon impurities from 100. The method is applicable over the range of impurities from 1 to 500 parts per million volume (ppmV).
1.2 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 some specific hazard statements, see Section 6.
1.3 The values stated in acceptable metric units are to be regarded as the standard. The values in parentheses are for information only.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D2505 − 88(Reapproved 2010)
Standard Test Method for
Ethylene, Other Hydrocarbons, and Carbon Dioxide in High-
1
Purity Ethylene by Gas Chromatography
This standard is issued under the fixed designation D2505; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope helium as the carrier gas. Methane and ethane are determined
by using a silica gel column. Propylene and heavier hydrocar-
1.1 This test method covers the determination of carbon
bons are determined using a hexamethylphosphoramide
dioxide,methane,ethane,acetylene,andotherhydrocarbonsin
(HMPA) column. Acetylene is determined by using, in series,
high-purity ethylene. Hydrogen, nitrogen, oxygen, and carbon
a hexadecane column and a squalane column. Carbon dioxide
monoxide are determined in accordance with Test Method
is determined using a column packed with activated charcoal
D2504. The percent ethylene is obtained by subtracting the
impregnated with a solution of silver nitrate in β,β'-
sum of the percentages of the hydrocarbon and nonhydrocar-
oxydipropionitrile. Columns other than those mentioned above
bon impurities from 100. The method is applicable over the
may be satisfactory (see 5.3). Calibration data are obtained
range of impurities from 1 to 500 parts per million volume
(ppmV). using standard samples containing the impurities, carbon
dioxide, methane, and ethane in the range expected to be
1.2 This standard does not purport to address all of the
encountered. Calibration data for acetylene are obtained as-
safety concerns, if any, associated with its use. It is the
suming that acetylene has the same peak area response on a
responsibility of the user of this standard to establish appro-
weight basis as methane. The acetylene content in a sample is
priate safety and health practices and determine the applica-
calculatedonthebasisoftheratioofpeakareaoftheacetylene
bility of regulatory limitations prior to use. For some specific
peak to the peak area of a known amount of methane.
hazard statements, see Section 6.
Calculations for carbon dioxide, methane, and ethane are
1.3 The values stated in acceptable metric units are to be
regarded as the standard. The values in parentheses are for carried out by the peak-height measurement method.
information only.
4. Significance and Use
2. Referenced Documents
2 4.1 High-purityethyleneisrequiredasafeedstockforsome
2.1 ASTM Standards:
manufacturing processes, and the presence of trace amounts of
D2504Test Method for Noncondensable Gases in C and
2
carbon dioxide and some hydrocarbons can have deleterious
Lighter Hydrocarbon Products by Gas Chromatography
effects. This method is suitable for setting specifications, for
D4051Practice for Preparation of Low-Pressure Gas Blends
use as an internal quality control tool and for use in develop-
E260Practice for Packed Column Gas Chromatography
ment or research work.
F307Practice for Sampling Pressurized Gas for GasAnaly-
sis
5. Apparatus
3. Summary of Test Method
5.1 Any chromatographic instrument with an overall sensi-
3.1 The sample is separated in a gas chromatograph system
tivity sufficient to detect 2 ppmV or less of the compounds
utilizing four different packed chromatographic columns with
listed with a peak height of at least 2 mm without loss of
resolution.
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This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee
5.2 Detectors—Thermal Conductivity—If a methanation re-
D02.D0.02 on Ethylene.
actor is used, a flame ionization detector is also required. To
Current edition approved May 1, 2010. Published May 2010. Originally
ε1
determine carbon dioxide with a flame ionization detector, a
approved in 1966. Last previous edition approved in 2004 as D2505–88 (2004) .
DOI: 10.1520/D2505-88R10. methanation reactor must be inserted between the column and
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
the detector and hydrogen added as a reduction gas (see Test
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Method D2504, Appendix X1, Preparation of Methanation
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Reactor).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D2505 − 88 (2010)
FIG. 2 Gas-Blending Manifold
FIG. 1 Typical Chromatogram for Propylene
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6.3 Active Solids—Activated carbon, 30 to 40-mesh, silica
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gel, 100 to 200-
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