ASTM D8455-22

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.
Designation: D8455 − 22
Standard Test Method for
Speciated Siloxane GC-IMS Analyzer Based On-line for
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Siloxane and Trimethylsilanol Content of Gaseous Fuels
This standard is issued under the fixed designation D8455; 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 D6621 Practice for Performance Testing of Process Analyz-
ers for Aromatic Hydrocarbon Materials
1.1 This test method is for the determination of speciated
siloxane concentrations in gaseous fuels using on-line Gas
3. Terminology
Chromatography Ion-Mobility Spectrometry (GC-IMS).
3.1 Definitions—For definitions of terms used in D03 Gas-
1.2 Units—The values stated in SI units are to be regarded
eous Fuels standards, refer to Terminology D4150.
as standard. The values given in parentheses after SI units are
3.2 Definitions of Terms Specific to This Standard:
provided for information only and are not considered standard.
3.2.1 siloxanes, n—a functional group in organosilicon
1.3 This standard does not purport to address all of the
chemical family with the Si—O—Si linkage.
safety concerns, if any, associated with its use. It is the
3.2.1.1 Discussion—In this test method, “siloxanes” include
responsibility of the user of this standard to establish appro-
both “siloxanes and trimethylsilanol (TMSOL).”
priate safety, health, and environmental practices and deter-
3.3 Abbreviations—Several of the following abbreviations
mine the applicability of regulatory limitations prior to use.
are for common siloxanes that can be determined according to
1.4 This international standard was developed in accor-
this test method. This is not meant to construe that this test
dance with internationally recognized principles on standard-
method is constrained to determining only these substances.
ization established in the Decision on Principles for the
3.3.1 D3—Hexamethylcyclotrisiloxane
Development of International Standards, Guides and Recom-
3.3.2 D4—Octamethylcyclotetrasiloxane
mendations issued by the World Trade Organization Technical
3.3.3 D5—Decamethylcyclopentasiloxane
Barriers to Trade (TBT) Committee.
3.3.4 D6—Dodecamethylcyclohexasiloxane
3.3.5 DMS—data management system
2. Referenced Documents
3.3.6 GC-IMS—Gas Chromatography Ion-Mobility Spec-
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2.1 ASTM Standards:
trometry
D3609 Practice for Calibration Techniques Using Perme-
3.3.7 L2—Hexamethyldisiloxane
ation Tubes
3.3.8 L3—Octamethyltrisiloxane
D3764 Practice forValidation of the Performance of Process
3.3.9 L4—Decamethyltetrasiloxane
Stream Analyzer Systems
3.3.10 L5—Dodecamethylpentasiloxane
D4150 Terminology Relating to Gaseous Fuels
3.3.11 NIST—National Institute of Standards and Technol-
D4298 Guide for Intercomparing Permeation Tubes to Es-
ogy
tablish Traceability
3.3.12 SOP—standard operating procedure
D5287 Practice for Automatic Sampling of Gaseous Fuels
3.3.13 TMSOL—Trimethylsilanol
D6299 Practice for Applying Statistical Quality Assurance
and Control Charting Techniques to Evaluate Analytical
4. Summary of Test Method
Measurement System Performance
4.1 A representative sample of a gaseous fuel is extracted
from a process pipe or pipeline and is transferred in a timely
manner through an appropriately designed sampling system to
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ThistestmethodisunderthejurisdictionofASTMCommitteeD03onGaseous
the inlet of a siloxane analyzer.The sample is conditioned with
Fuels and is the direct responsibility of Subcommittee D03.12 on On-Line/At-Line
a minimum, preferably negligible, impact on the siloxane
Analysis of Gaseous Fuels.
content. The line used to transfer gas from the process pipe or
Current edition approved May 1, 2022. Published May 2022. DOI: 10.1520/
D8455-22.
pipeline to the instrument is heated to at least 65 °C to prevent
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
condensation of heavier siloxane species. The analyzer sample
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
loop is filled with a known volume of sample gas, after which
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. the contents of this sample loop are injected into a GC-IMS.
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D8455 − 22
Excess process or pipeline sample is either vented to 5. Significance and Use
atmosphere, or retu
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