Designation:D7677−11StandardTestMethodfortheContinuousMeasurementofDissolvedOzoneinLowConductivityWater1ThisstandardisissuedunderthefixeddesignationD7677;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverstheon-lineandin-linedetermi-nationofdissolvedozone(DO3)inlowconductivitywaterintherangefrom0.001mg/Lto5.0mg/LDO3andconductivity<100µS/cm,typicalofpharmaceuticalandmicroelectronicspurewaters.DO3isdetectedbycorrelatingtheresponseofamembrane-coveredelectrochemicalsensortothedissolvedozoneconcentration.1.2Thistestmethodprovidesamoreconvenientmeansforcontinuousmeasurementthanthecolorimetricmethodstypi-callyusedforgrabsamplemeasurements.1.3Thistestmethodhastheadvantageofhighsensitivityaswellasdurabilityintheprocessenvironmentandhasfewinterferences.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1129TerminologyRelatingtoWaterD1193SpecificationforReagentWaterD2777PracticeforDeterminationofPrecisionandBiasofApplicableTestMethodsofCommitteeD19onWaterD3370PracticesforSamplingWaterfromClosedConduits3.Terminology3.1Definitions—Fordefinitionsoftermsusedinthistestmethod,referto.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1dissolvedozone(DO3),n—Ozoneisthetri-atomicformofoxygenand,whendissolvedinwater,isuniformlydispersedandremainsinmolecularform.4.SummaryofTestMethod4.1Dissolvedozonemeasurementsaremadeonaflowingwatersamplecontainingdissolvedozonegas.4.2Thesensorflowhousingisconnectedtoaprocess-watersampleli...
