ASTM_D_5134_-_13.pdf

Designation:D513413Standard Test Method forDetailed Analysis of Petroleum Naphthas through n-Nonaneby Capillary Gas Chromatography1This standard is issued under the fixed designation D5134;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.INTRODUCTIONDespite the many advances in capillary gas chromatography instrumentation and the remarkableresolution achievable,it has proven difficult to standardize a test method for the analysis of a mixtureas complex as petroleum naphtha.Because of the proliferation of numerous,similar columns and theendless choices of phase thickness,column internal diameter,length,etc.,as well as instrumentoperating parameters,many laboratories use similar but not identical methods for the capillary GCanalysis of petroleum naphthas.Even minute differences in column polarity or column oventemperature,for example,can change resolution or elution order of components and make theiridentification an individual interpretive process rather than the desirable,objective application ofstandard retention data.To avoid this,stringent column specifications and temperature and flowconditions have been adopted in this test method to ensure consistent elution order and resolution andreproducible retention times.Strict adherence to the specified conditions is essential to the successfulapplication of this test method.1.Scope*1.1 This detailed hydrocarbon analysis(DHA)test methodcovers the determination of hydrocarbon components paraffins,naphthenes,and monoaromatics(PNA)of petroleum naphthasas enumerated in Table 1.Components eluting after n-nonane(bp 150.8 C)are determined as a single group.1.2 This test method is applicable to olefin-free(C7.1.5 Detailed hydrocarbon components in olefin containingsamples may be determined by DHA Test Methods D6729,D6730,or D6733.1.6 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.7 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 and health practices and determine the applica-bility of regulatory limitations prior to use.Specific warningstatements are given in Section 7.2.Referenced Documents2.1 ASTM Standards:2D1319 Test Method for Hydrocarbon Types in Liquid Petro-leum Products by Fluorescent Indicator AdsorptionD3700 Practice for Obtaining LPG Samples Using a Float-ing Piston CylinderD3710 Test Method for Boiling Range Distribution of Gaso-line and Gasoline Fractions by Gas ChromatographyD4057 Practice for Manual Sampling of Petroleum andPetroleum Products1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.04.0L on Gas Chromatography Methods.Current edition approved Dec.1,2013.Published January 2014.Originallyapproved in 1990.Last previous edition approved in 2008 as D5134 98(2008)1.DOI:10.1520/D5134-13.2For 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.*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 TABLE 1 Typical Retention Characteristics of Naphtha ComponentsNOTE1The abbreviations N and P refer to unidentified naphthenes and paraffins respectively.CompoundRetention Time,minAdjusted RetentionTime,minKovats RetentionIndex 35 CLinear Retention IndexMethane3.570.00100.0.Ethane3.650.08200.0.Propane3.840.27300.0.Isobutane4.140.57367.3.n-Butane4.390.82400.0.2,2-Dimethylpropane4.530.96415.5.Isopentane5.331.76475.0.n-Pentane5.842.27500.0.2,2-Dimethylbutane6.813.24536.2.Cyclopentane7.834.26564.1.2,3-Dimethylbutane7.894.32565.5.2-Methylpentane8.064.49569.5.3-Methylpentane8.725.15583.4.n-Hexane9.636.06600.0.2,2-Dimethylpentane11.227.65624.2.Methylcyclopentane11.397.82626.5.2,4-Dimethylpentane11.688.11630.3.2,2,3-Trimethylbutane12.098.52635.4.Benzene13.299.72649.1.3,3-dimethylpentane13.8410.27654.8.Cyclohexane14.1910.62658.3.2-Methylhexane15.2011.63667.8.2,3-Dimethylpentane15.3511.78669.1.1,1-Dimethylcyclopentane15.6112.04671.4.3-Methylhexane16.1812.61676.2.cis-1,3-Dimethylcyclopentane16.8813.31681.8.trans-1,3-Dimethylcyclopentane17.2213.65684.4.3-Ethylpentane17.4413.87686.1.trans-1,2-Dimethylcyclopentane17.5714.00687.0.2,2,4-Trimethylpentane17.8014.23688.7.n-Heptane19.4315.86700.0.Methylcyclohexane+cis-1,2-Dimethylcyclopentane22.5318.96718.6A.1,1,3-Trimethylcyclopentane+2,2-Dimethylhexane23.0519.48721.4A.Ethylcy