1、Designation:D513521Standard Test Method forAnalysis of Styrene by Capillary Gas Chromatography1This standard is issued under the fixed designation D5135;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A numb
2、er 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 covers the determination of the impu-rities typically found in styrene and uses those values todetermine the purity of styrene
3、 by difference by gas chroma-tography.Typical impurities in commercial styrene are foundin Table 1.1.2 This test method is applicable to impurity concentra-tions up to 1%.1.2.1 The limit of detection is 0.0003 mass%and the limitof quantitation is 0.0010 mass%.1.2.2 LOD and LOQ were calculated using
4、data from ILSresults for n-propylbenzene in Table 3.1.3 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 asstanda
5、rd.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,health,and environmental practices and determine the
6、appli-cability of regulatory limitations prior to use.For a specifichazard statement,see Section 9.1.6 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
7、 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 CyclicProductsD4307 Practice for Preparation of Liquid Blends for Use asAnalytical Standard
8、sD4790 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 Chro
9、matography 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 DocumentOSHA Regulations,29 CFR paragraphs 1910.1000 and1910.1200
10、33.Terminology3.1 See Terminology D4790 for definitions of terms used inthis test method.4.Summary of Test Method4.1 In this test method,the chromatogram peak area for eachimpurity is compared to the peak area of the internal standard(n-heptane or other suitable known)added to the sample.Fromthe res
11、ponse factors of these impurities relative to that of theinternal standard and the amount of internal standard added,1This 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 Sty
12、rene,Ethylbenzene and C9 and C10AromaticHydrocarbons.Current edition approved Jan.1,2021.Published February 2021.Originallyapproved in 1990.Last previous edition approved in 2016 as D5135 161.DOI:10.1520/D5135-21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Custo
13、mer 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.go
14、v.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 Decision on Principles for theDevelopment of Internat
15、ional Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1the concentration of the impurities are calculated.The styrenecontent is obtained by subtracting the total amount of allimpurities from 100.00.5.Significance and Use5.1 This t
16、est method is designed to obtain styrene purity onthe basis of impurities normally present in styrene and may beused for final product inspections and process control.5.2 This test method will detect the impurities shown inTable 1,non-aromatic hydrocarbons containing ten carbons orless,and others where specific impurity standards are available.Absolute purity cannot be determined if unknown impuritiesare present.6.Interferences6.1 The internal standard chosen must be satisfactorilyresolved from
