Designation:D6529−22StandardTestMethodforOperatingPerformanceofContinuousElectrodeionizationSystemsonFeedsfrom50µS⁄cmto1000µS/cm1ThisstandardisissuedunderthefixeddesignationD6529;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheoper-atingcharacteristicsofcontinuouselectrodeionization(CEDI)devicesusingsyntheticfeedsolutionsandisnotnecessarilyapplicabletonaturalwaters.Thistestmethodisaprocedureapplicabletosolutionswithaconductivityrangefromapproxi-mately50µS⁄cmto1000µS⁄cm.1.2ThistestmethodcoversthedeterminationofoperatingcharacteristicsunderstandardtestconditionsofCEDIdeviceswheretheelectricallyactivetransfermediathereinispredomi-nantlyunregenerated.Thisresultsinmorerapidachievementofsteadystateandshortertesttimethanwhenperformingatestwhichrequirestheactivemediabepredominantlyregen-erated.1.3Thistestmethodisnotnecessarilyindicativeofthefollowing:1.3.1Long-termperformanceonfeedwaterscontainingfoulantsorsparinglysolublesolutes,orboth,1.3.2Performanceonfeedsofbrackishwater,seawater,orotherhigh-salinityfeeds,1.3.3Performanceonsyntheticindustrialfeedsolutions,pharmaceuticals,orprocesssolutionsoffoodsandbeverages,or,1.3.4Performanceonfeedwaterslessthan50µS⁄cm,particularlyperformancerelatingtoorganicsolutes,colloidalorparticulatematter,orbiologicalormicrobialmatter.1.4Thistestmethod,subjecttothelimitationspreviouslydescribed,canbeappliedaseitheranaidtopredictexpecteddeionizationperformanceforagivenfeedwaterquality,orasatestmethodtodeterminewhetherperformanceofagivendevicehaschangedoversomeperiodoftime.Itisultimately,however,theuser’sresponsibilitytoensurethevalidityofthistestmethodfortheirspecificapplications.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstan...
