ASTM D2426-19

Standard Test Method for Butadiene Dimer and Styrene in Butadiene Concentrates by Gas Chromatography

SIGNIFICANCE AND USE
4.1 Butadiene dimer and styrene may be present as impurities in commercial butadiene. This test method is suitable for use in internal quality control and in establishing product specifications.
SCOPE
1.1 This test method covers the determination of butadiene dimer (4-vinylcyclohexene-1) and styrene in butadiene concentrates, both recycle and specification grade.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements see Sections 6 and 8.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 30-Nov-2019
• ICS: 71.080.10 - Aliphatic hydrocarbons
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.D0.04 - C4 and C5 Hydrocarbons

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D2426 − 19
Standard Test Method for
Butadiene Dimer and Styrene in Butadiene Concentrates by
1
Gas Chromatography
This standard is issued under the fixed designation D2426; 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* 3. Summary of Test Method
3.1 The sample is introduced into a gas-liquid partition
1.1 This test method covers the determination of butadiene
column. The components of interest are separated as they are
dimer (4-vinylcyclohexene-1) and styrene in butadiene
transported through the column by a carrier gas, and their
concentrates, both recycle and specification grade.
presence in the effluent is detected and recorded as a chromato-
1.2 The values stated in SI units are to be regarded as
gram. Packed columns are used, and either thermal conductiv-
standard. No other units of measurement are included in this
ity or ionization detectors are permissible. The quantity of the
standard.
components of interest present in the sample is determined
from the chromatogram by comparing their peak areas or
1.3 This standard does not purport to address all of the
heights with those obtained from a synthetic sample.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Significance and Use
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use. 4.1 Butadiene dimer and styrene may be present as impuri-
ties in commercial butadiene. This test method is suitable for
For specific precautionary statements see Sections 6 and 8.
use in internal quality control and in establishing product
1.4 This international standard was developed in accor-
specifications.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5. Apparatus
Development of International Standards, Guides and Recom-
5.1 Chromatograph—Any chromatograph having either a
mendations issued by the World Trade Organization Technical
thermal conductivity or flame ionization detector may be used.
Barriers to Trade (TBT) Committee.
The detector system shall have sufficient sensitivity to obtain a
deflection of at least 2 mm at a signal-to-noise ratio of at least
2. Referenced Documents
5:1 for 0.01 % by mass of butadiene dimer and styrene under
2
2.1 ASTM Standards:
the operating conditions prescribed in this test method.
D1657 Test Method for Density or Relative Density of Light
5.2 Recorder—A 0 mV to 1 mV, 0 mV to 5 mV, or 0 mV to
Hydrocarbons by Pressure Hydrometer
10 mV recorder with a full-scale response time of 2 s or less,
D1945 Test Method for Analysis of Natural Gas by Gas
and with sufficient sensitivity to meet the requirements of 5.1.
Chromatography
D2593 Test Method for Butadiene Purity and Hydrocarbon 5.3 Column—Any column may be used that is capable of
Impurities by Gas Chromatography resolving the butadiene dimer and styrene as discrete peaks,
2
quantitatively proportional to concentration and within an
2.2 Other Documents:
elapsed time sufficiently short to be practical.
STP 109A Physical Constants of Hydrocarbons C to C
1 10
5.4 Liquid Sampling Valve—Any liquid sampling valve may
be used that will permit the reproducible introduction of the
butadiene concentrate as a liquid under its vapor pressure or
1
This test method is under the jurisdiction of ASTM Committee D02 on
higher and in a quantity sufficient to meet the sensitivity and
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.D0.04 on C4 and C5 Hydrocarbons. resolution requirements in 5.1 and 5.3, respectively.
Current edition approved Dec. 1, 2019. Published January 2020. Originally
NOTE 1—Suitable valves are commercially available
approved in 1965. Last previous edition approved in 2014 as D2426 – 93 (2014).
DOI: 10.1520/D2426-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 6. Reagents and Materials
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.1 4-vinylcyclohexene-1 and Styrene, for calibration, purity
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. of not less than 99 %.
*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 ----------------------
D2426 − 19
TABLE 1 Columns and Conditions Used Successfully
Carbowax
Dow Silicone C
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D2426 − 93 (Reapproved 2014) D2426 − 19
Standard Test Method for
Butadiene Dimer and Styrene in Butadiene Concentrates by
1
Gas Chromatography
This standard is issued under the fixed designation D2426; 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 Scope*
1.1 This test method covers the determination of butadiene dimer (4-vinylcyclohexene-1) and styrene in butadiene concentrates,
both recycle and specification grade.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. For specific precautionary statements see Sections 6 and 8.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D1657 Test Method for Density or Relative Density of Light Hydrocarbons by Pressure Hydrometer
D1945 Test Method for Analysis of Natural Gas by Gas Chromatography
D2593 Test Method for Butadiene Purity and Hydrocarbon Impurities by Gas Chromatography
2
2.2 Other Documents:
STP 109A Physical Constants of Hydrocarbons C to C
1 10
3. Summary of Test Method
3.1 The sample is introduced into a gas-liquid partition column. The components of interest are separated as they are transported
through the column by a carrier gas, and their presence in the effluent is detected and recorded as a chromatogram. Packed columns
are used, and either thermal conductivity or ionization detectors are permissible. The quantity of the components of interest present
in the sample is determined from the chromatogram by comparing their peak areas or heights with those obtained from a synthetic
sample.
4. Significance and Use
4.1 Butadiene dimer and styrene may be present as impurities in commercial butadiene. This test method is suitable for use in
internal quality control and in establishing product specifications.
5. Apparatus
5.1 Chromatograph—Any chromatograph having either a thermal conductivity or flame ionization detector may be used. The
detector system shall have sufficient sensitivity to obtain a deflection of at least 2 mm at a signal-to-noise ratio of at least 5:1 for
0.01 weight %0.01 % by mass of butadiene dimer and styrene under the operating conditions prescribed in this test method.
5.2 Recorder—A 00 mV to 1-mV, 01 mV, 0 mV to 5-mV,5 mV, or 00 mV to 10-mV10 mV recorder with a full-scale response
time of 2 s or less, and with sufficient sensitivity to meet the requirements of 5.1.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.D0.04 on C4 and C5 Hydrocarbons.
Current edition approved May 1, 2014Dec. 1, 2019. Published July 2014January 2020. Originally approved in 1965. Last previous edition approved in 20092014 as
D2426 – 93 (2009).(2014). DOI: 10.1520/D2426-93R14.10.1520/D2426-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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 ----------------------
D2426 − 19
TABLE 1 Columns and Conditions Used Successfully
Carbowax
Dow Silicone Carbowax Carbowax Polyethylene Barecowax
Silicone SE-30 20M + Dow
200 1500 1540 Glycol-6000 1035
Corning Hi Vac
Column length, m 1.5 4.6 3.7 15.2 3.1 3.7 6.1
Column diameter, mm 3.2 4.8 6.4 0.5 6.4 4.8 6.4
Column temperature, °C 85 110 100 75 100–128 155 140
Liquid phase, wt % 10 15 16 . 0.75
...