1、Designation:D426696(Reapproved 2009)1Standard Test Methods forPrecoat Capacity of Powdered Ion-Exchange Resins1This standard is issued under the fixed designation D4266;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、 revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEUpdated 5.2 editorially in June 2009.1.Scope1.1 These test methods cover the determination of theoperating ion-exchange capacity of b
3、oth powdered cation-exchange resins(hydrogen form)and powdered anion-exchange resins(hydroxide form).These test methods areintended for use in testing new powdered ion-exchange resinswhen used for the treatment of water.The following two testmethods are included:SectionsTest Method AOperating Capaci
4、ty,Anion-ExchangeResin,Hydroxide Form7 to 15Test Method BOperating Capacity,Cation-ExchangeResin,Hydrogen Form16 to 241.2 The values stated in SI units are to be regarded as thestandard.The inch-pound units given in parentheses are forinformation only.1.3 This standard does not purport to address al
5、l of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1125 Test Methods for E
6、lectrical Conductivity and Resis-tivity of WaterD1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD2687 Practices for Sampling Particulate Ion-Exchange Ma-terialsD4456 Test Methods for Physical and Chemical Propertiesof Powdered Ion Exchange ResinsE200 Practice for Preparation,
7、Standardization,and Storageof Standard and Reagent Solutions for Chemical Analysis3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 For definitions of other terms used in these testmethods,refer to Terminology D1129.3.1.2 powdered ion-exchange material,n an ion-exchangeresin that
8、 has undergone post-manufacturing size reduction toless than 300 m.3.1.3 resin dosage,nthe weight of mixed resin applied perunit area of precoatable filter surface.This is expressed as drypounds per square foot.3.1.4 resin floc,nthat voluminous aggregate formed whenpowdered anion-exchange resin and
9、powdered cation-exchange resin are slurried together in an aqueous suspension.3.1.5 resin ratio,nthe ratio of the weights of powderedcation-exchange resin to powdered anion-exchange resin usedto prepare a resin slurry.If not otherwise indicated,it isunderstood to be the ratio of the dry resin weight
10、s.4.Significance and Use4.1 The salt removal capacity of a powdered resin precoat islimited by the capacity of either the anion-exchange resin orthe cation-exchange resin contained in it.Applications includecondensate polishing in fossil-fueled electric generating plants,as well as condensate polish
11、ing,spent fuel pool watertreatment,reactor water treatment,and low-level radioactiveliquid waste treatment in nuclear-powered electric generatingplants.4.2 By determining the ion-exchange capacity profile ofeither a cation exchange resin or an anion-exchange resin(capacity expended per unit of time
12、under specific conditions),it is possible to estimate runlength and remaining capacitywhen treating a liquid of the same makeup.Although theycannot accurately predict performance during condenser leaks,these test methods are useful for determining operating capaci-ties as measured under the test con
13、ditions used.4.3 These test methods may be used to monitor the perfor-mance of either powdered anion-exchange resin or powdered1These test methods are under the jurisdiction of ASTM Committee D19 onWater and are the direct responsibility of Subcommittee D19.08 on Membranes andIon Exchange Materials.
14、Current edition approved May 1,2009.Published June 2009.Originallyapproved in 1983.Last previous edition approved in 2007 as D4266 96(2007).DOI:10.1520/D4266-96R09E01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book
15、 of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 cation-exchange resin.The total capacity of either resin de-pends primarily upon the numb
16、er density of ion-exchange siteswithin the resin.The operating capacity is a function of thetotal capacity,degree of conversion to the desired ionic formwhen received,and properties of the resin and the system thataffect ion exchange kinetics.5.Purity of Reagents5.1 Reagent grade chemicals shall be used in all tests.Unless otherwise indicated,it is intended that all reagents shallconform to the specifications of the Committee on AnalyticalReagents of the American Chemical Society,where suchspeci
