ASTM_D_6144_-_13.pdf

Designation:D614413Standard 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 revision.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 chromatography 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-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 typically added as a stabilizer to AMS.Theimpurities in AMS can be analyzed over a range of 5 to 800mg/kg by this method.(See Table 1.)The limit of detection forthese impurities is typically in the range of 5 to 10 mg/kg.(SeeTable 1.)1.3 In determining the conformance of the test results usingthis 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 all the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.For specific hazard statements,seeSection 8.2.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 AssuranceProcedures 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 Precision 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.4.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 AMS1This test method is under the jurisdiction of ASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility ofSubcommittee D16.07 on Styrene,Ethylbenzene and C9 and C10 AromaticHydrocarbons.Current edition approved June 1,2013.Published June 2013.Originallyapproved in 1997.Last previous edition approved in 2012 as D6144 12.DOI:10.1520/D6144-13.2For 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 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 Conshohocken,PA 19428-2959.United States1 content)is calculated by subtracting the sum of the impuritiesfrom 100.00.Results are reported in weight percent.5.Significance and Use5.1 This test method is suitable for setting specifications onthe materials referenced in 1.2 and for use as an internal qualitycontrol tool where AMS is produced or is used in a manufac-turing process.It may also be used in development or researchwork involving AMS.5.2 This test method is useful in determining the purity ofAMS with normal impurities present.If extremely high boilingor unusual impurities are present in the AMS,this test methodwould not necessarily detect them and the purity calculationwould be erroneous.6.Apparatus6.1 Gas ChromatographAny instrument having a flameionization detector that can be operated at the conditions givenin Table 2.The system should have sufficient sensitivity toob