Designation:D2687−95(Reapproved2016)StandardPracticesforSamplingParticulateIon-ExchangeMaterials1ThisstandardisissuedunderthefixeddesignationD2687;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesepractices2coverproceduresforobtainingrepre-sentativesamplesofion-exchangematerials.Thefollowingpracticesareincluded:SectionsPracticeA—SamplingfromaSinglePackageandMultiplePackageLotsorShipments4to11PracticeB—SamplingfromFixedBedIon-ExchangeEquipmentHavingUnrestrictedHeadRoom12to16PracticeC—SamplingfromFixedBedIon-ExchangeEquipmentHavingRestrictedHeadRoom17to211.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3C183PracticeforSamplingandtheAmountofTestingofHydraulicCementD1129TerminologyRelatingtoWater3.Terminology3.1Definitions—CertaintermsinthesepracticesthatrelatetoionexchangearedefinedinTerminologyD1129.PRACTICEA—SAMPLINGFROMASINGLEPACKAGEANDMULTIPLEPACKAGELOTSORSHIPMENTS4.SummaryofPractice4.1Ahollow,sample-probeguidethatiscomprisedofmatingthreadedsectionsandthatcanbeextendedtoanyconvenientlengthbytheadditionofmoresections,isinsertedintoanion-exchangeunit.Asamplingtubeisinsertedthroughtheprobeguideandisconnectedtoavacuumsource.Ion-exchangematerialisremovedbyeduction.Acoresampleralsomaybeused.5.SignificanceandUse5.1Thispracticewillbeusedmostfrequentlytosamplematerialsasreceivedfromthemanufacturerintheoriginalshippingcontainerandpriortoanyresin-conditioningproce-dure.Sincecertainion-exchangematerialsaresuppliedbythemanufacturerinthedryorfree-flowingstatewhereasothersaresuppliedmoist,itisnecessarytoemploytwodifferentsam-p...
