Designation:D6508−15StandardTestMethodforDeterminationofDissolvedInorganicAnionsinAqueousMatricesUsingCapillaryIonElectrophoresisandChromateElectrolyte1ThisstandardisissuedunderthefixeddesignationD6508;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationoftheinor-ganicanionsfluoride,bromide,chloride,nitrite,nitrate,ortho-phosphate,andsulfateindrinkingwater,wastewater,andotheraqueousmatricesusingcapillaryionelectrophoresis(CIE)withindirectUVdetection.SeeFigs.1-6.1.2Thetestmethodusesachromate-basedelectrolyteandindirectUVdetectionat254nm.Itisapplicableforthedeterminationorinorganicanionsintherangeof0.1to50mg/Lexceptforfluoridewhoserangeis0.1to25mg/L.1.3Itistheresponsibilityoftheusertoensurethevalidityofthistestmethodforotheranionconcentrationsanduntestedaqueousmatrices.NOTE1—Thehighestacceptedanionconcentrationsubmittedforprecisionandbiasextendtheanionconcentrationrangeforthefollowinganions:Chlorideto93mg/L,Sulfateto90mg/L,Nitrateto72mg/L,andortho-phosphateto58mg/L.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareprovidedforinforma-tiononlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection9.2.ReferencedDocuments2.1ASTMStandards:2D1066PracticeforSamplingSteamD1129TerminologyRelatingtoWaterD1193SpecificationforReagentWaterD2777PracticeforDeterminationofPrecisionandBiasofApplicableTestMethodsofCommitteeD19onWaterD3370PracticesforSamplingWaterfromClosedConduitsD3856GuideforManagementSyst...
