Designation:D7266−13(Reapproved2018)´1StandardTestMethodforAnalysisofCyclohexanebyGasChromatography(ExternalStandard)1ThisstandardisissuedunderthefixeddesignationD7266;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—Section8waseditoriallycorrectedinJanuary2018.1.Scope1.1Thistestmethodcoversthedeterminationofthepurityofcyclohexanebygaschromatography.Calibrationofthegaschromatographysystemisdonebytheexternalstandardcalibrationtechnique.1.2ThistestmethodhasbeenfoundapplicabletothemeasurementofimpuritiessuchasthosefoundinTable1,whichareimpuritiesthatmaybefoundincyclohexane.Theimpuritiescanbeanalyzedoverarangeof3to200mg/kgbythismethod,butmaybeapplicabletoawiderrange.1.3Thelimitofdetectionis1mg/kg.1.4Indeterminingtheconformanceofthetestresultsusingthistestmethodtoapplicablespecifications,resultsshallberoundedoffinaccordancewiththerounding-offmethodofPracticeE29.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection8.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D3437PracticeforSamplingandHandlingLiquidCyclicProductsD4307PracticeforPreparationofLiquidBlendsforUseasAnalyticalStandardsD4790TerminologyofAromaticHydrocarbonsandRelatedChemicalsD680...
