Designation:D5391−14StandardTestMethodforElectricalConductivityandResistivityofaFlowingHighPurityWaterSample1ThisstandardisissuedunderthefixeddesignationD5391;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofelectricalconductivityandresistivityofhighpuritywatersamplesbelow10µS/cm(above0.1Mohm-cm).Itisapplicabletobothcontinuousandperiodicmeasurementsbutinallcases,thewatermustbeflowinginordertoproviderepresentativesampling.Staticgrabsamplingcannotbeusedforsuchhighpuritywater.Continuousmeasurementsaremadedirectlyinpurewaterprocesslines,orinsidestreamsamplelinestoenablemeasurementsonhightemperatureorhighpressuresamples,orboth.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1066PracticeforSamplingSteamD1125TestMethodsforElectricalConductivityandResis-tivityofWaterD1129TerminologyRelatingtoWaterD1192GuideforEquipmentforSamplingWaterandSteaminClosedConduits(Withdrawn2003)3D1193SpecificationforReagentWaterD2186TestMethodsforDeposit-FormingImpuritiesinSteamD2777PracticeforDeterminationofPrecisionandBiasofApplicableTestMethodsofCommitteeD19onWaterD3370PracticesforSamplingWaterfromClosedConduitsD3864GuideforOn-LineMonitoringSystemsforWaterAnalysisD4519TestMethodforOn-LineDeterminationofAnionsandCarbonDioxideinHighPurityWaterbyCationExchangeandDegassedCationConductivity3.Terminology3.1Definitions—Fordefinitionsofothertermsusedinthesetestmethods,refertoTerminologyD1129.3.1.1electricalconduc...
