ASTM_D_3760_-_18.pdf

Designation:D376018Standard Test Method forAnalysis of Isopropylbenzene(Cumene)by GasChromatography1This standard is issued under the fixed designation D3760;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 purityof isopropylbenzene(cumene)by gas chromatography.1.2 This test method has been found applicable to themeasurement of impurities such as nonaromatic hydrocarbons,benzene,ethylbenzene,t-butylbenzene,n-propylbenzene,alpha-methylstyrene,sec-butylbenzene,anddiisopropylbenzene,which are common to the manufacturingprocess of isopropylbenzene.The limit of quantitation for theseimpurities averages 0.0030 wt.%based on the data in Table 2,while the limit of detection for these impurities averages0.0010 wt.%.This method has been found applicable forconcentrations of various components up to 0.0571 wt.%.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 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.For specific hazard statements,see Section 7.1.6 This international 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)Committee.2.Referenced Documents2.1 ASTM Standards:2D3437 Practice for Sampling and Handling Liquid CyclicProductsD6809 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 SpecificationsE260 Practice for Packed Column Gas ChromatographyE355 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.Summary of Test Method3.1 A known amount of internal standard is added to asample of isopropylbenzene.The prepared sample is mixedand analyzed by a gas chromatograph equipped with a flameionization detector(FID).The peak area of each impurity andthe internal standard is measured and the amount of eachimpurity is calculated from the ratio of the peak area of theinternal standard versus the peak area of the impurity.Purity byGC(the isopropylbenzene content)is calculated by subtractingthe sum of the impurities found from 100.00.Results arereported in weight percent.4.Significance and Use4.1 This test method is suitable for setting specifications onthe materials referenced in 1.2 and for use as an internal quality1This test method is 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.1,2018.Published January 2018.Originallyapproved in 1979.Last previous edition approved in 2013 as D3760 13.DOI:10.1520/D3760-18.2For 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 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 Organization Technical Barriers to Trade(TBT)Committee.1 control tool where isopropylbenzene is produced or is used ina manufacturing process.It may also be used in developmentor research work involving isopropylbenzene.4.2 This test method is useful in determining the purity ofisopro