Designation:E180–03StandardPracticeforDeterminingthePrecisionofASTMMethodsforAnalysisandTestingofIndustrialandSpecialtyChemicals1ThisstandardisissuedunderthefixeddesignationE180;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeestablishesuniformstandardsforexpress-ingtheprecisionandbiasoftestmethodsforindustrialandspecialtychemicals.Itincludesanabridgedprocedurefordevelopingthisinformation,basedonthesimplestelementsofstatisticalanalysis.Thereisnointenttorestrictqualifiedgroupsintheiruseofothertechniques.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.3Inthispractice,thevocabularyandguidelinesforcalculationandinterpretationofstatisticaldataaccordingtotheISOarefollowedascloselyaspossible.ParticularreferenceismadetoISO5725,Parts1to6.2.ReferencedDocuments2.1ASTMStandards:2D1013TestMethodforTotalNitrogeninResinsandPlasticsD1727TestMethodforUreaContentofNitrogenResinsE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE178PracticeforDealingwithOutlyingObservationsE456TerminologyRelatingtoQualityandStatisticsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethodE1169GuideforConductingRuggednessTests2.2ISODocument:ISO5725Accuracy(truenessandprecision)ofmeasure-mentsandresults33.SignificanceandUse3.1Alltestmethodsrequirestatementsofprecisionandbias.Theinformationforthesestatementsisgeneratedbyaninterlaboratorystudy(ILS).Thispracticeprovidesaspecificdesignandanalysisforthestudy,andspecificformatsfortheprecisionandbiasstatements.Itisof...
