1、Designation:D845522Standard Test Method forSpeciated Siloxane GC-IMS Analyzer Based On-line forSiloxane and Trimethylsilanol Content of Gaseous Fuels1This standard is issued under the fixed designation D8455;the number immediately following the designation indicates the year oforiginal adoption or,i
2、n the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method is for the determination of speciatedsiloxane concentrations in gaseous
3、 fuels using on-line GasChromatography Ion-Mobility Spectrometry(GC-IMS).1.2 UnitsThe values stated in SI units are to be regardedas standard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.3 This standard does not purport to address
4、all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in a
5、ccor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM
6、 Standards:2D3609 Practice for Calibration Techniques Using Perme-ation TubesD3764 Practice for Validation of the Performance of ProcessStream Analyzer SystemsD4150 Terminology Relating to Gaseous FuelsD4298 Guide for Intercomparing Permeation Tubes to Es-tablish TraceabilityD5287 Practice for Autom
7、atic Sampling of Gaseous FuelsD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD6621 Practice for Performance Testing of Process Analyz-ers for Aromatic Hydrocarbon Materials3.Terminology3.1 DefinitionsFor de
8、finitions of terms used in D03 Gas-eous Fuels standards,refer to Terminology D4150.3.2 Definitions of Terms Specific to This Standard:3.2.1 siloxanes,na functional group in organosiliconchemical family with the SiOSi linkage.3.2.1.1 DiscussionIn this test method,“siloxanes”includeboth“siloxanes and
9、trimethylsilanol(TMSOL).”3.3 AbbreviationsSeveral of the following abbreviationsare for common siloxanes that can be determined according tothis test method.This is not meant to construe that this testmethod is constrained to determining only these substances.3.3.1 D3Hexamethylcyclotrisiloxane3.3.2
10、D4Octamethylcyclotetrasiloxane3.3.3 D5Decamethylcyclopentasiloxane3.3.4 D6Dodecamethylcyclohexasiloxane3.3.5 DMSdata management system3.3.6 GC-IMSGas Chromatography Ion-Mobility Spec-trometry3.3.7 L2Hexamethyldisiloxane3.3.8 L3Octamethyltrisiloxane3.3.9 L4Decamethyltetrasiloxane3.3.10 L5Dodecamethyl
11、pentasiloxane3.3.11 NISTNational Institute of Standards and Technol-ogy3.3.12 SOPstandard operating procedure3.3.13 TMSOLTrimethylsilanol4.Summary of Test Method4.1 A representative sample of a gaseous fuel is extractedfrom a process pipe or pipeline and is transferred in a timelymanner through an a
12、ppropriately designed sampling system tothe inlet of a siloxane analyzer.The sample is conditioned witha minimum,preferably negligible,impact on the siloxanecontent.The line used to transfer gas from the process pipe orpipeline to the instrument is heated to at least 65 C to preventcondensation of h
13、eavier siloxane species.The analyzer sampleloop is filled with a known volume of sample gas,after whichthe contents of this sample loop are injected into a GC-IMS.1This test method is under the jurisdiction ofASTM Committee D03 on GaseousFuels and is the direct responsibility of Subcommittee D03.12
14、on On-Line/At-LineAnalysis of Gaseous Fuels.Current edition approved May 1,2022.Published May 2022.DOI:10.1520/D8455-22.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to t
15、he standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the D
16、ecision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1Excess process or pipeline sample is either vented toatmosphere,or returned to the process stream,depending onapplication,safety concerns,and regulatory requirements.Ifthe analyzer is installed inside a building and excess samplegas is vented to atmosphere,the operator should run aventilation line to a fume hood or outsid
