1、Designation:D426617Standard 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 revision.A number
2、 in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover the determination of theoperating ion-exchange capacity of both powdered cation-exchange resins(hydrogen form)and powder
3、ed 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 Capacity,Anion-ExchangeResin,Hydroxide Form7 to 15Test Method BOpe
4、rating 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 all of thesafety concerns,if any,associated with its use.It is
5、 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.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization es
6、tablished in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1125 Test Methods for Electrical Conductivity and Resis-tivity
7、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 ResinsD5391 Test Method for Electrical Conductivity and Resis-tivity of a Fl
8、owing High Purity Water SampleE200 Practice for Preparation,Standardization,and Storageof Standard and Reagent Solutions for Chemical Analysis3.Terminology3.1 Definitions:3.1.1 For definitions of other terms used in this standard,refer to Terminology D1129.3.2 Definitions of Terms Specific to This S
9、tandard:3.2.1 powdered ion-exchange material,nan ion-exchangeresin that has undergone post-manufacturing size reduction toless than 300 m.3.2.2 resin dosage,nthe weight of mixed resin applied perunit area of precoatable filter surface.This is expressed as drypounds per square foot.3.2.3 resin floc,n
10、that voluminous aggregate formed whenpowdered anion-exchange resin and powdered cation-exchange resin are slurried together in an aqueous suspension.3.2.4 resin ratio,nthe ratio of the weights of powderedcation-exchange resin to powdered anion-exchange resin usedto prepare a resin slurry.If not othe
11、rwise indicated,it isunderstood to be the ratio of the dry resin weights.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 i
12、n fossil-fueled electric generating plants,as well as condensate polishing,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 exchan
13、ge resin or an anion-exchange resin(capacity expended per unit of time 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,1These test methods are und
14、er the jurisdiction of ASTM Committee D19 onWater and are the direct responsibility of Subcommittee D19.08 on Membranes andIon Exchange Materials.Current edition approved June 1,2017.Published June 2017.Originallyapproved in 1983.Last previous edition approved in 2009 as D4266 96(2009)1.DOI:10.1520/
15、D4266-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box
16、 C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 these test methods are useful for determining operating capaci-ties as measured under the test conditions used.4.3 These test methods