Designation:E1172−87(Reapproved2011)StandardPracticeforDescribingandSpecifyingaWavelength-DispersiveX-RaySpectrometer1ThisstandardisissuedunderthefixeddesignationE1172;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthecomponentsofawavelength-dispersiveX-rayspectrometerthatarebasictoitsoperationandtothequalityofitsperformance.Itisnottheintentofthispracticetospecifycomponenttolerancesorperformancecriteria,astheseareuniqueforeachinstrument.Thedocumentdoes,however,attempttoidentifywhichofthesearecriticalandthuswhichshouldbespecified.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificsafetyhazardstatementsaregivenin5.3.1.2and5.3.2.4,andinSection7.1.3ThereareseveralbooksandpublicationsfromtheNationalInstituteofStandardsandTechnology2andtheU.S.GovernmentPrintingOffice3,4whichdealwiththesubjectofX-raysafety.ReferalsotoPracticeE416.52.ReferencedDocuments2.1ASTMStandards:5E135TerminologyRelatingtoAnalyticalChemistryforMetals,Ores,andRelatedMaterialsE416PracticeforPlanningandSafeOperationofaSpec-trochemicalLaboratory(Withdrawn2005)6E876PracticeforUseofStatisticsintheEvaluationofSpectrometricData(Withdrawn2003)63.Terminology3.1ForterminologyrelatingtoX-rayspectrometry,refertoTerminologyE135.4.SignificanceandUse4.1Thispracticedescribestheessentialcomponentsofawavelength-dispersiveX-rayspectrometer.ThisdescriptionispresentedsothattheuserorpotentialusermaygainacursoryunderstandingofthestructureofanX-rayspectrometersys-tem.Italsoprovidesameansforcomparingandevaluatingdifferentsystemsaswellasunderstandingthecapabilitiesandlimitationsofeachinstrument....
