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1、ThisinternationalstandardwasdevelopedinaccordancewithinternationallyrecognizedprinciplesonstandardizationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecommendationsissuedbytheWorldTradeOrganizationTechnicalBarrie
2、rstoTrade(TBT)Committee.Designation:D4328−18StandardPracticeforCalculationofSupersaturationofBariumSulfate,StrontiumSulfate,andCalciumSulfateDihydrate(Gypsum)in1BrackishWater,Seawater,andBrinesThisstandardisissuedundertheÞxeddesignationD4328;thenumberimme
3、diatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*D513
4、TestMethodsforTotalandDissolvedCarbonDioxideinWater1.1ThispracticecoversthecalculationofsupersaturationofD516TestMethodforSulfateIoninWaterbariumsulfate,strontiumsulfate,andcalciumsulfatedihydrateD1129TerminologyRelatingtoWater(gypsum)inbrackishwater,seaw
5、ater,andbrinesinwhichD3352TestMethodforStrontiumIoninBrackishWater,barium,strontium,andcalciumionseithercoexistorexistSeawater,andBrinesindividuallyinsolutioninthepresenceofsulfateions.D3370PracticesforSamplingWaterfromClosedConduits1.2Thispracticeisnotap
6、plicableforcalculatingcalciumD3561TestMethodforLithium,Potassium,andSodiumsulfatedihydratesupersaturationifthetemperaturesofsalineIonsinBrackishWater,Seawater,andBrinesbyAtomicwatersunderinvestigationexceed95¡C.AttemperaturesaboveAbsorptionSpectrophotomet
7、ry95¡C,hemianhydrateandanhydritewouldbemajorinsolubleD3651TestMethodforBariuminBrackishWater,Seawater,forms.andBrines1.3ThevaluesstatedinSIunitsaretoberegardedasD3986TestMethodforBariuminBrines,Seawater,andstandard.Nootherunitsofmeasurementareincludedinth
8、isBrackishWaterbyDirect-CurrentArgonPlasmaAtomicstandard.EmissionSpectroscopy1.4Thisstandarddoesnotpurporttoaddressallofthe3.Terminologysafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthiss
