Designation:D6442−06(Reapproved2012)StandardTestMethodforDeterminationofCopperReleaseRateFromAntifoulingCoatingsinSubstituteOceanWater1ThisstandardisissuedunderthefixeddesignationD6442;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthelaboratorydeterminationoftherateatwhichcopperisreleasedfromanantifouling(AF)coatinginsubstituteoceanwater.Thepracticallimitsforquantifyingcopperreleaseratesbythismethodarefrom1.8to500µgcm-2d-1.Thisrangemaybeextendedto0.2to500µgcm-2d-1iftheanalyticalproceduredescribedinAppendixX1isfollowed.NOTE1—Theterm“substituteoceanwater”isusedthroughoutthisstandardtorefertoartificialorsyntheticseawaterpreparedinaccordancewithPracticeD1141.1.2Theprocedurecontainsthepreparationstepsforthereleaseratedeterminationofcopperfromantifoulingpaintsincludingapparatus,reagents,holdingtankconditions,andsamplingpointdetails.AnalysisfortheconcentrationofcopperinsubstituteoceanwaterrequirestheaccuratedeterminationofcopperatthelowpartsµgL-1(partsperbillion,ppb)level.Todetectandcorrectforreagentimpurities,acceptableanalyticalprecisionstandardsarenecessary.Therefore,thelimitofquantitation(LOQ)forcopperinsubstituteoceanwaterfortheanalyticalmethodshallbe10µgL-1(10ppb)orless.TheprocedurefordeterminingtheLOQforcopperinsubstituteoceanwaterfortheanalyticalmethodisfoundinAnnexA2.1.3AsuitablemethodisdescribedinAppendixX1(graph-itefurnaceatomicabsorptionspectroscopy,GF-AAS).Otheranalyticalmethodsmaybeutilizedwithrelevantproceduralchanges,asneeded,toaccommodateselectedspecificmethods.Suchmethodsmustmeetthelimitofquantitationforcopperinsubstituteoceanwaterof10µgL-1(10ppb)orless.See1.2.1.4Thisresultsofthistestmethoddonotreflectenviron-mentalcopperreleaseratesforantifoulingproducts,andarenotsuitablefordirectuseintheprocessofgenerati...
