Designation:E1151−93(Reapproved2011)StandardPracticeforIonChromatographyTermsandRelationships1ThisstandardisissuedunderthefixeddesignationE1151;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticedealsprimarilywithidentifyingthetermsandrelationshipsofthosetechniquesthatuseionexchangechromatographytoseparatemixturesandaconductivitydetec-tortodetecttheseparatedcomponents.However,mostofthetermsshouldalsoapplytoionchromatographictechniquesthatemployotherseparationanddetectionmechanisms.1.2Becauseionchromatographyisaliquidchromato-graphictechnique,thispracticeuses,wheneverpossiblethetermsandrelationshipsidentifiedinPracticeE682.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E682PracticeforLiquidChromatographyTermsandRela-tionships3.DescriptionsofTechniques3.1IonChromatography,(IC)—ageneraltermforseveralliquidcolumnchromatographictechniquesfortheanalysisofionicorionizablecompounds.Ofthemanyusefulseparationanddetectionschemes,thosemostwidelyusedhavebeenthetwotechniquesdescribedin3.2and3.3inwhichionexchangeseparationiscombinedwithconductimetricdetection.Bydescribingonlythesetwotechniques,thispracticedoesnotmeantoimplythatICistiedonlytoionexchangechroma-tographyorconductimetricdetection.3.2ChemicallySuppressedIonChromatography,(DualColumnIonChromatography)—Inthistechnique,samplecom-ponentsareseparatedonalowcapacityionexchangeranddetectedconductimetrically.Detectionoftheanalyteionsisenhancedbyselectivelysuppressingt...
