ASTM_D_8003_-_15.pdf

Designation:D800315Standard Test Method forDetermination of Light Hydrocarbons and Cut PointIntervals in Live Crude Oils and Condensates by GasChromatography1This standard is issued under the fixed designation D8003;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.Scope1.1 This test method covers the determination of lighthydrocarbons and cut point intervals by gas chromatography inlive crude oils and condensates with VPCR4(see Note 1)up to500 kPa at 37.8 C.NOTE1As described in Test Method D6377.1.2 Methane(C1)to hexane(nC6)and benzene are speciatedand quantitated.Samples containing mass fractions of up to 0.5%methane,2.0%ethane,10%propane,or 15%isobutanemay be analyzed.A mass fraction with a lower limit of 0.001%exists for these compounds.1.3 This test method may be used for the determination ofcut point carbon fraction intervals(see 3.1.2)of live crude oilsand condensates from initial boiling point(IBP)to 391 C(nC24).The nC24plus fraction is reported.1.4 Dead oils or condensates sampled in accordance with12.1 may also be analyzed.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5.1 ExceptionWhere there is no direct SI equivalentsuch as tubing size.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1265 Practice for Sampling Liquefied Petroleum(LP)Gases,Manual MethodD3700 Practice for Obtaining LPG Samples Using a Float-ing Piston CylinderD4307 Practice for Preparation of Liquid Blends for Use asAnalytical StandardsD5002 Test Method for Density and Relative Density ofCrude Oils by Digital Density AnalyzerD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD6377 Test Method for Determination of Vapor Pressure ofCrude Oil:VPCRx(Expansion Method)D6792 Practice for Quality System in Petroleum Productsand Lubricants Testing LaboratoriesE1510 Practice for Installing Fused Silica Open TubularCapillary Columns in Gas Chromatographs2.2 Other Regulations:CAN/CGSB-3.0 No.14.3-99 Standard Test Method for theIdentification of Hydrocarbon Components in AutomotiveGasoline using Gas Chromatography33.Terminology3.1 Definitions:3.1.1 D1265 cylinder,na container used for storage andtransportation of a sample obtained at pressures above atmo-spheric pressure as described in Practice D1265.3.1.2 cut point carbon fraction interval,nthe percent massobtained between two selected n-paraffins of the interval.Thecut point carbon fraction interval as used in this test method isdefined as the percent mass obtained between the end of onen-paraffin peak to the end of the next n-paraffin peak,thus atemperature interval is not used to determine the cut points butrather the end points sequential of a n-paraffin peak pair.3.1.3 dead crude oil,na term usually employed for crudeoils that,when exposed to normal atmospheric pressure atroom temperature,will not result in actual boiling of thesample.1This 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 June 1,2015.Published July 2015.DOI:10.1520/D8003-15.2For 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 Standards Council of Canada(SCC),60055 Metcalfe St.,Ottowa,ON K1P 6L5,http:/www.scc.ca.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.3.1 DiscussionThese crudes will have vapor pressuresbelow atmospheric pressure at room temperature.3.1.4 floating piston cylinder,na high pressure samplecontainer,with a free floating internal piston that effectivelydivides the container into two separate compartments,asdescribed in Practice D3700.3.1.5 live crude oil,ncrude oil with sufficiently high vaporpressure that it would boil if exposed to normal atmosphericpressure at room temperature.3.1.5.1 DiscussionSampling and handling of live crudeoils requires a pressurized sample system and pressurizedsample containers to ensure sample integrity and prevent lossof volatile components.3.1.6 residue,nthe percent mass of the sample that eitherdoes not elute from the column or elutes after the end of thenC24peak.3.1