Designation:D5381−93(Reapproved2014)StandardGuideforX-RayFluorescence(XRF)SpectroscopyofPigmentsandExtenders1ThisstandardisissuedunderthefixeddesignationD5381;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThisguidecoversthegeneralconsiderationsforproperuseofX-rayfluorescence(XRF)spectroscopy.BecausemanydifferencesexistbetweenXRFinstruments,nodetailedoper-atinginstructionsareprovided.Theanalystshouldfollowtheinstructionsprovidedbythemanufacturerforhisinstrument.1.2Theanalystisencouragedtoconsultthechemicalliterature,varioustradejournals,pigmentsupplierpublications,etc.,aswellastheinstrumentmanualsfromthemanufacturer.1.3XRFiscommonlyemployedtodeterminetheelementspresentininorganicpigmentsandextenders,ofteninconcertwithotheranalysistechniques.Organicpigmentscannotnor-mallybeidentifiedsolelybyXRF.Onoccasion,organicpigmentscontainheavierelementsthatcandistinguishbe-tweenmajorclassesofthesepigmentsormayservetodistinguishoneofthetwodistinctpigments.However,theanalystshouldbewaryofaqualitativepigmentidentificationsolelybyXRFtechnique.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.ForspecifichazardinformationseeSection3onRadiationConcerns.2.ReferencedDocuments2.1ASTMStandards:2D3925PracticeforSamplingLiquidPaintsandRelatedPigmentedCoatings3.RadiationConcerns3.1ModernXRFinstrumentationhasbeendesignedtominimizeexposureoflaboratorypersonneltoX-rayradiationduringinstrumentuse.However,mostlaboratoriesusedosim-etrytomonitorpersonnelwhoarenormallypresentaroundtheXRFinstrumentwhileitisinoperation.Suchdosimetrydevicesarenormallyreadonamonthlybasis.3.2AfterXRFinstrumentmai...
