Designation:D1688−12StandardTestMethodsforCopperinWater1ThisstandardisissuedunderthefixeddesignationD1688;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope*1.1Thesetestmethodscoverthedeterminationofcopperinwaterbyatomicabsorptionspectrophotometry.Threetestmethodsareincludedasfollows:TestMethodConcentrationRangeSectionsA—AtomicAbsorption,Direct0.05to5mg/L7-15B—AtomicAbsorption,Chelation-Extraction50to500µg/L16-24C—AtomicAbsorption,GraphiteFurnace5to100µg/L25-331.2Eitherdissolvedortotalrecoverablecoppermaybedetermined.Determinationofdissolvedcopperrequiresfiltra-tionthrougha0.45-µm(No.325)membranefilteratthetimeofcollection.In-linemembranefiltrationispreferable.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemaremathematicalconversionsandmaynotbeexactequivalents;therefore,eachsystemshallbeusedinde-pendentlyoftheother.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeNote4,Note6,Note10,andNote16.1.5Threeformerphotometrictestmethodswerediscontin-ued.RefertoAppendixX1forhistoricalinformation.2.ReferencedDocuments2.1ASTMStandards:2D858TestMethodsforManganeseinWaterD1066PracticeforSamplingSteamD1068TestMethodsforIroninWaterD1129TerminologyRelatingtoWaterD1193SpecificationforReagentWaterD1687TestMethodsforChromiuminWaterD1691TestMethodsforZincinWaterD1886TestMethodsforNickelinWaterD2777PracticeforDeterminationofPrecisionandBiasofApplicableTestMethodsofCommitteeD19onWaterD3370PracticesforSamplingWaterfromC...
