Designation:D5547−95(Reapproved2017)StandardTestMethodforClayandZeoliteinPowderedLaundryDetergentsbyAtomicAbsorption1ThisstandardisissuedunderthefixeddesignationD5547;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversatomicabsorptiontestsappli-cabletopowderedlaundrydetergentscontainingclayandzeolite.21.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3E180PracticeforDeterminingthePrecisionofASTMMethodsforAnalysisandTestingofIndustrialandSpe-cialtyChemicals(Withdrawn2009)43.SummaryofTestMethod3.1Thetestsampleisfusedwithlithiummetaborate,dissolvedinacid,itssiliconandaluminumcontentmeasuredbyatomicabsorption,andthesilicon/aluminum(Si/Al)ratiocalculated.TheclayandzeolitecontentofthetestsampleiscalculatedfromtheSi/AlratioofthetestsampleandtheSi/Alratiooftheclayandzeoliteexpectedinthetestsample.4.Interferences4.1Materialsotherthanclayandzeolitethatcontainsiliconoraluminum,orboth,willinterfere.5.Principle5.1Clayandzeolitecontainsiliconandaluminumatdiffer-entrelativelevels.5Thesilicon/aluminumratioisthenameasureoftherelativelevelofclayandzeoliteindetergentpowders.Thatis,detergentpowderswithaSi/Alratiomatch-ingclayorzeolitecontainonlyclayorzeolite,respectively.DetergentpowderswithSi/AlratiofallingbetweentheSi/Alratioofclayandzeolitecontainbothclayandzeolite.5.2Thistestmethodisbasedonthelinearrelationshipbetweentherelativecomposition(orratio)ofclay/zeoliteindetergentpowdersandtheSi/Alratioofsuchdetergents.5.3Acalibrationequationisderivable,therefore,fromjusttw...
