Designation:D4328−08(Reapproved2013)StandardPracticeforCalculationofSupersaturationofBariumSulfate,StrontiumSulfate,andCalciumSulfateDihydrate(Gypsum)inBrackishWater,Seawater,andBrines1ThisstandardisissuedunderthefixeddesignationD4328;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthecalculationofsupersaturationofbariumsulfate,strontiumsulfate,andcalciumsulfatedihydrate(gypsum)inbrackishwater,seawater,andbrinesinwhichbarium,strontium,andcalciumionseithercoexistorexistindividuallyinsolutioninthepresenceofsulfateions.1.2Thispracticeisnotapplicableforcalculatingcalciumsulfatedihydratesupersaturationifthetemperaturesofsalinewatersunderinvestigationexceed95°C.Attemperaturesabove95°C,hemianhydrateandanhydritewouldbemajorinsolubleforms.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D511TestMethodsforCalciumandMagnesiumInWaterD512TestMethodsforChlorideIonInWaterD513TestMethodsforTotalandDissolvedCarbonDioxideinWaterD516TestMethodforSulfateIoninWaterD1129TerminologyRelatingtoWaterD3352TestMethodforStrontiumIoninBrackishWater,Seawater,andBrinesD3370PracticesforSamplingWaterfromClosedConduitsD3561TestMethodforLithium,Potassium,andSodiumIonsinBrackishWater,Seawater,andBrinesbyAtomicAbsorptionSpectrophotometryD3651TestMethodforBariuminBrackishWater,Seawater,andBrinesD3986TestMethodforBariuminBrines,Seawater,andBrackishWaterbyDirect-CurrentArgonPlasmaAtomicEmissionSpectroscopy3.Terminology3.1Definitions—Ford...
