ASTM D1141-98(2003)海水代用品

Designation:D1141–98(Reapproved2003)

AnAmericanNationalStandard

StandardPracticefor

thePreparationofSubstituteOceanWater1

Thisstandardisissuedunderthe xeddesignationD1141;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.

1.Scope

1.1Thispracticecoversthepreparationofsolutionscon-taininginorganicsaltsinproportionsandconcentrationsrep-resentativeofoceanwater.2

NOTE1—Sincetheconcentrationsofoceanwatervarieswithsamplinglocation,thegrossconcentrationemployedhereinisanaverageofmanyreliableindividualanalyses.Traceelements,occurringnaturallyincon-centrationsbelow0.005mg/L,arenotincluded.

E200PracticeforPreparation,Standardization,andStorageofStandardandReagentSolutionsforChemicalAnalysis43.Terminology

3.1De nitions—Forde nitionsoftermsusedinthisprac-tice,refertoTerminologyD1129.

3.2De nitionOfTermSpeci ctoThisStandard:

3.2.1chlorinity,,n—theweightofsilverion(g)requiredtocompletelyprecipitatethehalidesin0.3285kgofwater(g/kg).4.Signi canceandUse

4.1Thissubstituteoceanwatermaybeusedforlaboratorytestingwhereareproduciblesolutionsimulatingseawaterisrequired.Examplesarefortestsonoilcontamination,deter-gencyevaluation,andcorrosiontesting.

NOTE2—Thelackoforganicmatter,suspendedmatter,andmarinelifeinthissolutiondoesnotpermitunquali edacceptanceoftestresultsasrepresentingperformanceinactualoceanwater.Wherecorrosionisinvolved,theresultsobtainedfromlaboratorytestsmaynotapproximatethosesecuredundernaturaltestingconditionsthatdiffergreatlyfromthoseofthelaboratory,andespeciallywhereeffectsofvelocity,saltatmospheres,ororganicconstituentsareinvolved.Alsotherapiddepletionofreactingelementspresentinlowconcentrationssuggestscautionindirectapplicationofresults.

1.2Thispracticeprovidesthreestocksolutions,eachrela-tivelyconcentratedbutstableinstorage.Forpreparationofsubstituteoceanwater,aliquotsofthe rsttwostocksolutionswithaddedsaltarecombinedinlargervolume.Anaddedre nementinadjustmentofheavymetalconcentrationisprovidedbytheadditionofasmallaliquotofthethirdstocksolutiontotheprevioussolution.

1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:

D1129TerminologyRelatingtoWater3D1193Speci cationforReagentWater3

ThispracticeisunderthejurisdictionofASTMCommitteeD19onWaterandistheresponsibilityofSubcommitteeD19.02onGeneralSpeci cations,TechnicalResources,andStatisticalMethods.

CurrenteditionapprovedAug.10,stpreviouseditionapprovedin1998asD1141–98e1.2

Thispracticeisbaseduponthefollowingstudies:

MayandBlack,“SyntheticOceanWater,”NavalResearchLaboratoryReportP-2909,August1946.

May,T.P.andAlexander,A.L.,“SprayTestingwithNaturalandSyntheticSeaWater,PartI–CorrosionCharacteristicsintheTestingofMetals,”Proceedings,ASTM,Vol50,1950.

Alexander,A.L.andMay,T.P.,“SprayTestingwithNaturalandSyntheticSeaWater,PartII–AStudyofOrganicCoatings,”Proceedings,ASTM,Vol50,1950.3

AnnualBookofASTMStandards,Vol11.01.

1

5.ReagentsandMaterials

5.1PurityofReagents—Reagentgradechemicalsshallbeusedinalltests.Unlessotherwiseindicated,itisintendedthatallreagentsshallconformtothespeci cationsoftheCommit-teeonAnalyticalReagentsoftheAmericanChemicalSociety.5Othergradesmaybeused,provideditis rstascertainedthatthereagentisofsufficientlyhighpuritytopermititsusewithoutlesseningtheaccuracyofthedetermination.

AnnualBookofASTMStandards,Vol15.05.

ReagentChemicals,AmericanChemicalSocietySpeci cations,AmericanChemicalSociety,Washington,DC.ForsuggestionsonthetestingofreagentsnotlistedbytheAmericanChemicalSociety,seeAnalarStandardsforLaboratoryChemicals,BDHLtd.,Poole,Dorset,U.K.,andtheUnitedStatesPharmacopeiaandNationalFormulary,U.S.PharmacopeialConvention,Inc.(USPC),Rockville,MD.

54

Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.

1