Designation:E1172−16StandardPracticeforDescribingandSpecifyingaWavelengthDispersiveX-RaySpectrometer1ThisstandardisissuedunderthefixeddesignationE1172;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThispracticecoversthecomponentsofawavelengthdispersiveX-rayspectrometerthatarebasictoitsoperationandtothequalityofitsperformance.Itisnottheintentofthispracticetospecifycomponenttolerancesorperformancecriteria,astheseareuniqueforeachinstrument.However,thepracticedoesattempttoidentifywhichtolerancesarecriticalandthuswhichshouldbespecified.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesandtodeterminetheapplicabilityofregulatorylimitationspriortouse.Specificsafetyhazardstatementsaregivenin5.3.1.2and5.3.2.4,andinSection7.2.ReferencedDocuments2.1ASTMStandards:2E135TerminologyRelatingtoAnalyticalChemistryforMetals,Ores,andRelatedMaterialsE2857GuideforValidatingAnalyticalMethods3.Terminology3.1ForterminologyrelatingtoX-rayspectrometry,refertoTerminologyE135.4.SignificanceandUse4.1ThispracticedescribestheessentialcomponentsofawavelengthdispersiveX-rayspectrometer.ThisdescriptionispresentedsothattheuserorpotentialusermaygainacursoryunderstandingofthestructureofanX-rayspectrometersys-tem.Italsoprovidesameansforcomparingandevaluatingdifferentsystemsaswellasunderstandingthecapabilitiesandlimitationsofeachinstrument.4.2ItisunderstoodthatalaboratorymayimplementthispracticeoranX-rayfluorescencemethodinpartnershipwithamanufactureroftheanalyticalinstrumentation.Ifalaboratorychoosestoconsultwithaninstrumentmanufacturer,thenthefollowingshouldbeconsidered.Thelaboratoryshouldhaveanideaofthealloymatricestobeanalyzed,elementsandmassfractionranges...
