Designation:D7871−13StandardTestMethodforAnalysisofCyclohexanebyGasChromatography(EffectiveCarbonNumber)1ThisstandardisissuedunderthefixeddesignationD7871;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthepurityofcyclohexanebygaschromatography.1.2ThistestmethodhasbeenfoundapplicabletothemeasurementofimpuritiessuchasthosefoundinTable1,whichareimpuritiesthatmaybefoundincyclohexane.Theimpuritiescanbeanalyzedoverarangeof1to400mg/kgbythismethod,butmaybeapplicabletoawiderrange.1.3Thelimitofdetectionis1mg/kg.1.4Indeterminingtheconformanceofthetestresultsusingthistestmethodtoapplicablespecifications,resultsshallberoundedoffinaccordancewiththerounding-offmethodofPracticeE29.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardsstatements,seeSection8.2.ReferencedDocuments2.1ASTMStandards:2D3437PracticeforSamplingandHandlingLiquidCyclicProductsD4790TerminologyofAromaticHydrocarbonsandRelatedChemicalsD6809GuideforQualityControlandQualityAssuranceProceduresforAromaticHydrocarbonsandRelatedMa-terialsE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE355PracticeforGasChromatographyTermsandRelation-shipsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethodE1510PracticeforInstallingFusedSilicaOpenTubularCapillaryColumnsinGasChromatographs2.2OtherStandards:3OSHARegualtions,29CFRparagraphs1910.1000and1910.12003.Terminology3.1SeeTerminologyD4790fordefinitionso...
