Designation:D1193−06(Reapproved2018)FederalTestMethodStandardNo.7916StandardSpecificationforReagentWater1ThisstandardisissuedunderthefixeddesignationD1193;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1ThisspecificationdescribestherequiredcharacteristicsofwatersdeemedsuitableforusewiththestandardsunderthejurisdictionofASTM.1.2Thealphanumericcharactersascribedtowatertypesandgradesarespecifiedinthemanual,FormandStyleforASTMStandards.Thesehavebeenassignedinorderofhistoricalprecedenceandshouldnotbetakenasanindicationofaprogressioninwaterpurity.1.3Fourtypesofwatershavebeenspecified,withthreeadditionalgradesthatcanbeappliedtothefourtypes.Thegradespecificationsspecificallyaddresscontaminantsofmi-crobiologicalorigin.1.4AllapplicableASTMStandardsareexpectedtorefer-enceoneormoreofthesereagentwatertypeswherereagentwaterisneededasacomponentofananalyticalmeasurementprocess.WhereadifferentwatertypeorgradeisneededforanASTMStandard,itmaybeaddedtothisSpecificationthroughtheASTMStandardrevisionprocess.1.5AlthoughthesewatertypesandassociatedgradeshavebeendefinedspecificallyforusewithASTMStandards,theymaybeappropriateforotherapplications.Itistheresponsi-bilityoftheusersofthisspecificationtoensurethattheselectedwatertypesorgradesaresuitablefortheirintendeduse.Historically,reagentwaterTypesI,II,III,andIVhavebeenlinkedtospecificprocessesfortheirproduction.Startingwiththisrevision,thesetypesofwatersmaybeproducedwithalternatetechnologiesaslongastheappropriateconstituentspecificationsaremetandthatwatersoproducedhasbeenshowntobeappropriatefortheapplicationwheretheuseofsuchwaterisspecified.Therefore,theselectionofanalternatetechnologyinplaceofthetechnologyspecifiedinTable1shouldbemadetakingintoaccountth...
