Designation:D501−03(Reapproved2009)StandardTestMethodsofSamplingandChemicalAnalysisofAlkalineDetergents1ThisstandardisissuedunderthefixeddesignationD501;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thesetestmethodscoverproceduresforthesamplingandchemicalanalysisofinorganicalkalinedetergents.1.2Theproceduresappearinthefollowingorder:SectionsCausticSoda:Sampling5TotalAlkalinityasSodiumOxide(Na2O)6–8SodiumHydroxide(NaOH)9–11CarbonateasSodiumCarbonate(Na2CO3)12CarbonDioxide(CO2)bytheEvolutionMethod13–16SodaAsh:Sampling17MatterVolatileat150to155°C18and19TotalAlkalinityasSodiumCarbonate(Na2CO3)20–22SodiumBicarbonate(NaHCO3)23–25SodiumBicarbonate(NaHCO3)byPotentiometricTitration26–28MatterInsolubleinWater29and30ApparentDensity31and32ModifiedSoda(SequicarbonateType):Sampling33TotalAlkalinityasSodiumOxide(Na2O)34–36SodiumBicarbonate(NaHCO3)andSodiumCarbonate(Na2CO3)37–39MatterInsolubleinWater40SodiumBicarbonate:Sampling41SodiumBicarbonate,SodiumCarbonate,andFreeMoisture42–45MatterInsolubleinWater46SodiumMetasilicate,SodiumSesquisilicateandSodiumOrthosil-icate:Sampling47TotalAlkalinityasSodiumOxide(Na2O)48–50TotalSilicaasSiO251–53SodiumMetasilicate(Na2SiO3·5H2O)54SodiumSesquisilicate(3Na2O·2SiO2·11H2O)55MatterInsolubleinWater56and57LossonIgnitionofSodiumSesquisilicate(3Na2O·2SiO2·11H2O)58and59SodiumOrthosilicate(Na4SiO4)60TrisodiumPhosphate:Sampling61TrisodiumPhosphate(Na3PO4)ContentandPhosphorusPentoxide(P2O5)62–64TrisodiumPhosphateCalculatedasNa3PO4·12H2O,Na3PO4·H2O,Na3PO4,andasP2O565–68TotalAlkalinityasSodiumOxide(Na2O)69–71SectionsMatterInsolubleinWater72and73TetrasodiumPyrophosphate:Sampling74TetrasodiumPyrophosphate(Na4P2O7)75–79MatterInsolubleinWater80an...
