Designation:D7360−11StandardTestMethodforAnalysisofBenzenebyGasChromatographywithExternalCalibration1ThisstandardisissuedunderthefixeddesignationD7360;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofnormallyoccurringtraceimpuritiesin,andthepurityof,finishedbenzenebygaschromatographywithexternalcalibration.Asimilartestmethod,usingtheinternalstandardtechniqueofcalibrationisTestMethodD4492.1.2Thistestmethodisapplicablefornonaromatichydro-carbonimpuritiesatlevelsfrom5to2000mg/kgandforbenzenepuritiesof99.80weight%orhigher.1.3Thistestmethodisapplicableforaromaticimpuritiesfrom5to2000mg/kginbenzene.1.4Thistestmethodhasbeenfoundapplicabletohetero-atomicspeciessuchas1,4-dioxane,from10to2000mg/kginbenzene.1.5Thelimitofdetectionforaromaticimpuritiesis0.9mg/kg,2.7mg/kgfor1,4-dioxaneand1.1mg/kgformethylcyclohexane.1.6Indeterminingtheconformanceofthetestresultsusingthismethodtoapplicablespecifications,resultsshallberoundedoffinaccordancewiththerounding-offmethodofPracticeE29.1.7ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.8Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection9.2.ReferencedDocuments2.1ASTMStandards:2D3437PracticeforSamplingandHandlingLiquidCyclicProductsD3798TestMethodforAnalysisofp-XylenebyGasChro-matography(Withdrawn2009)3D4307PracticeforPreparationofLiquidBlendsforUseasAnalyticalStandardsD4492TestMethodforAnalysisofBenzenebyGasChro-matographyD4790TerminologyofAromaticHydrocarbonsandRelatedChemicalsD6809GuideforQualityControlandQ...
