1、Designation:D614422Standard Test Method forAnalysis of AMS(-Methylstyrene)by Capillary GasChromatography1This standard is issued under the fixed designation D6144;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revis
2、ion.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the determination of the purityofAMS(-methylstyrene)by gas chromatography.Calibrationof the gas chromatograp
3、hy system is done by the externalstandard calibration technique.1.2 This test method has been found applicable to themeasurement of impurities such as cumene,3-methyl-2-cyclopentene-1-one,n-propylbenzene,tert-butylbenzene,sec-butylbenzene,cis-2-phenyl-2-butene,acetophenone,1-phenyl-1-butene,2-phenyl
4、-2-propanol,trans-2-phenyl-2-butene,m-cymene,p-cymene,and phenol,which are common to themanufacturing process of AMS.The method has also beenfound applicable for the determination of para-tertiary-butylcatechol(TBC or PTBC)typically added as a stabilizer toAMS.The impurities in AMS can be analyzed o
5、ver a range of5 to 800 mg/kg by this method.(See Table 2.)Based on theresults in ASTM Research Report RR:D16-1022,summarizedin Table 2,the limit of quantitation for these impuritiesaverages 4 mg/kg,while the limit of detection averages1.2 mgkg.1.3 In determining the conformance of the test results u
6、singthis method to applicable specifications,results shall berounded off in accordance with the rounding-off method ofPractice E29.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 This standard does not purport to address
7、all the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety,health,and environmental practices and determine the appli-cability of regulatory limitations prior to use.For specifichazard statements,see Section 8.1.6 This i
8、nternational standard was developed in accor-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)
9、Committee.2.Referenced Documents2.1 ASTM Standards:2D3437 Practice for Sampling and Handling Liquid CyclicProductsD4307 Practice for Preparation of Liquid Blends for Use asAnalytical StandardsD4790 Terminology of Aromatic Hydrocarbons and RelatedChemicalsD6809 Guide for Quality Control and Quality A
10、ssuranceProcedures for Aromatic Hydrocarbons and Related Ma-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE355 Practice for Gas Chromatography Terms and Relation-shipsE691 Practice for Conducting an Interlaboratory Study toDetermine the Prec
11、ision of a Test MethodE1510 Practice for Installing Fused Silica Open TubularCapillary Columns in Gas Chromatographs2.2 Other Document:OSHA Regulations,29 CFR paragraphs 1910.1000 and1910.120033.Terminology3.1 See Terminology D4790 for definition of terms used inthis test method.1This test method is
12、 under the jurisdiction of ASTM Committee D16 onAromatic,Industrial,Specialty and Related Chemicals and is the direct responsi-bility of Subcommittee D16.07 on Styrene,Ethylbenzene and C9 and C10AromaticHydrocarbons.Current edition approved Jan.1,2022.Published January 2022.Originallyapproved in 199
13、7.Last previous edition approved in 2017 as D6144 17.DOI:10.1520/D6144-22.2For 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 the standards Document Summary page onthe ASTM
14、website.3Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Cons
15、hohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organ
16、ization Technical Barriers to Trade(TBT)Committee.14.Summary of Test Method4.1 AMS(-methylstyrene)is analyzed by a gas chromato-graph(GC)equipped with a flame ionization detector(FID).Aprecisely repeatable volume of the sample to be analyzed isinjected onto the gas chromatograph.The peak areas of theimpurities are measured and converted to concentrations via anexternal standard methodology.Purity by GC(the AMScontent)is calculated by subtracting the sum of the impuritiesfrom 100.00.Purity result
