Designation:D4589–96StandardTestMethodforNitrobenzeneinAniline1ThisstandardisissuedunderthefixeddesignationD4589;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversapolarographicprocedureforthedeterminationofnitrobenzeneinaniline.1.2Thistestmethodhasbeenfoundapplicabletothedeterminationofnitrobenzeneinanilinecontainingconcentra-tionsofnotmorethan25mg/kgnitrobenzene.1.3Thefollowingappliestoallspecifiedlimitsinthistestmethod:forpurposesofdeterminingconformancewiththistestmethod,anobservedvalueoracalculatedvalueshallberoundedoff“tothenearestunit”inthelastright-handdigitusedinexpressingthespecificationlimit,inaccordancewiththerounding-offmethodofPracticeE29.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection10andNote3.2.ReferencedDocuments2.1ASTMStandards:D1193SpecificationforReagentWater2D1549TestMethodforZincinLubricatingOilsandAdditives(PolarographicMethod)3D3436PracticeforSamplingandHandlingAniline4D4790TerminologyofAromaticHydrocarbonsandRe-latedChemicals4E29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecifications5E50PracticesforApparatus,Reagents,andSafetyPrecau-tionsforChemicalAnalysisofMetals62.2OtherDocument:OSHARegulations,29CFR,paragraphs1910.1000and1910.120073.Terminology3.1SeeTerminologyD4790fordefinitionoftermsusedinthistestmethod.4.SummaryofTestMethod4.1Polarographyisanelectrochemicalmethodofanalysis.Aquantitativeevaluationofanelectro-reduciblematerialsuchasnitrobenzenecanbedeterminedbymeasuringthecharac-teristiccurrentflow,asafunctionofanincreasinglyappliedvoltage,re...
