ASTM_D_3257_-_06_2012.pdf

Designation:D325706(Reapproved 2012)Standard Test Methods forAromatics in Mineral Spirits by Gas Chromatography1This standard is issued under the fixed designation D3257;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 These test methods cover the determination of ethylben-zene and total eight-carbon(C8)and heavier aromatics in theconcentration range from 0.1 to 30%in mineral spirits havinga distillation range from 149 to 210C(300 to 410F)asdetermined by Test Method D86.The procedures permit theidentification and calculation of concentrations of aromaticcomponents to 0.1 volume%.1.2 It is recognized by analytical chemists that a singlecolumn gas chromatography analysis of an unknown sample isrisky.In such cases,multiple and different analytical tech-niques must be used for absolutely positive identification,forexample,several different gas chromatography columns,gaschromatography/mass spectrometer,or gas chromatography/infrared,etc.In these test methods the material is known and isclearly defined.1.3 Oxygenated compounds,if present,may interfere andcause erroneous results.Such oxygenated compounds are notnormally present in mineral spirits.1.4 Three test methods are covered as follows:1.4.1 Test Method A,measurement of ethylbenzene content,C8plus higher aromatics(except ethylbenzene),and totalaromatics by means of a single packed column gas chromato-graphic analysis.1.4.2 Test Method B,measurement of ethylbenzene contentby means of a rapid packed column gas chromatographicanalysis.1.4.3 Test Method C,measurement of ethylbenzene content,C8plus higher aromatics(except ethylbenzene)and totalaromatics by means of a capillary column gas chromatographicanalysis.1.5 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.6 For purposes of determining conformance of an ob-served or a calculated value using this test method to relevantspecifications,test result(s)shall be rounded off“to the nearestunit”in the last right-hand digit used in expressing thespecification limit,in accordance with the rounding-off methodof Practice E29.1.7 For hazard information and guidance,see the suppliersMaterial Safety Data Sheet.1.8 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:2D86 Test Method for Distillation of Petroleum Products atAtmospheric PressureE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE180 Practice for Determining the Precision of ASTMMethods for Analysis and Testing of Industrial and Spe-cialty Chemicals(Withdrawn 2009)3E260 Practice for Packed Column Gas Chromatography2.2 ASTM Adjuncts:D2PP Determination of Precision and Bias Data43.Summary of Test Methods3.1 The material,with an internal standard,is introducedinto a gas chromatographic column containing a strongly polarliquid phase.The polar phase has very little affinity forsaturated and olefinic hydrocarbons while exhibiting a pro-nounced retention of aromatics.This selectivity,which isillustrated in Fig.1 results in the elution of all saturated and1These test methods are under the jurisdiction of ASTM Committee D01 onPaint and Related Coatings,Materials,and Applications and are the directresponsibility of Subcommittee D01.35 on Solvents,Plasticizers,and ChemicalIntermediates.Current edition approved June 1,2012.Published August 2012.Originallyapproved in 1973.Last previous edition approved in 2006 as D3257 06.DOI:10.1520/D3257-06R12.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from ASTM International Headquarters.Order Adjunct No.ADJD6300.*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 olefinic hydrocarbons in the products described above prior tothe elution of toluene.Either a thermal conductivity or flameionization detector may be used.Calibration is obtained in TestMethod A and C from a synthetic blend of the most importantaromatic compounds.Internal standards are used in all threetest methods.Typical chromatograms are shown in Fig.2 andFi