1、Designation:D591715(Reapproved 2019)Standard Test Method forTrace Impurities in Monocyclic Aromatic Hydrocarbons byGas Chromatography and External Calibration1This standard is issued under the fixed designation D5917;the number immediately following the designation indicates the year oforiginal adop
2、tion 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.Scope1.1 This test method covers the determination of the totalnonaromatic hydrocarbons
3、and trace monocyclic aromatichydrocarbons in toluene,mixed xylenes,and p-xylene by gaschromatography.The purity of toluene,mixed xylenes,orp-xylene can also be calculated.Calibration of the gas chro-matographic system is done by the external standard calibra-tion technique.A similar test method,usin
4、g the internalstandard calibration technique,is Test Method D2360.1.2 Total aliphatic hydrocarbons containing 1 through 10carbon atoms(methane through decanes)can be detected bythis test method at concentrations ranging from 0.001 to 2.500weight%.1.2.1 A small amount of benzene in mixed xylenes orp-
5、xylenes may not be distinguished from the nonaromatics andthe concentrations are determined as a composite(see 6.1).1.3 Monocyclic aromatic hydrocarbon impurities containing6 through 10 carbon atoms(benzene through C10aromatics)can be detected by this test method at individual concentrationsranging
6、from 0.001 to 1.000 weight%.1.4 In determining the conformance of the test results toapplicable specifications,results shall be rounded off in accor-dance with the rounding-off method of Practice E29.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are in
7、cluded in thisstandard.1.6 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 limita
8、tions prior to use.For specific hazard statement,see Section 9.1.7 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-mendatio
9、ns issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D841 Specification for Nitration Grade TolueneD2360 Test Method for Trace Impurities in MonocyclicAromatic Hydrocarbons by Gas Chromatography(With-drawn 2016)3D3437 Practice f
10、or Sampling and Handling Liquid CyclicProductsD4052 Test Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterD4307 Practice for Preparation of Liquid Blends for Use asAnalytical StandardsD4790 Terminology of Aromatic Hydrocarbons and RelatedChemicalsD5136 Specificat
11、ion for High Purity p-XyleneD5211 Specification for Xylenes for p-Xylene FeedstockD6526 Test Method for Analysis of Toluene by CapillaryColumn Gas Chromatography(Withdrawn 2018)3D6563 Test Method for Benzene,Toluene,Xylene(BTX)Concentrates Analysis by Gas Chromatography(With-drawn 2018)3D6809 Guide
12、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 Relat
13、ion-shipsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method1This test method is under the jurisdiction of ASTM Committee D16 onAromatic,Industrial,Specialty and Related Chemicals and is the direct responsi-bility of Subcommittee D16.01 on Benzene,Toluene
14、,Xylenes,Cyclohexane andTheir Derivatives.Current edition approved June 1,2019.Published June 2019.Originallyapproved in 1996.Last previous edition approved in 2015 as D5917 151.DOI:10.1520/D5917-15R19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service
15、 at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken
16、,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 E1510 Practice for Installing Fused Silica Open TubularCapillary Columns in Gas Chromatographs2.2 Other Document:OSHA Regulations,29 CFR paragraphs 1910.100
