ASTM_D_7513_-_09.pdf

Designation:D751309Standard Test Method forCapacity of Mixed Bed Ion Exchange Cartridges1This standard is issued under the fixed designation D7513;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of the perfor-mance of mixed bed ion exchange resin cartridges in the activeform when used for deionization.The test can be used todetermine the initial capacity of unused cartridges or theremaining capacity of used cartridges.In this case performanceis defined as ion exchange capacity(or throughput)to twodefined endpoints.The method does not measure organics anddoes not attempt to determine the ultimate water qualityattainable by the cartridge.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all 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 use2.Referenced Documents2.1 ASTM Standards:2D1125 Test Methods for Electrical Conductivity and Resis-tivity of WaterD1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D19 on WaterD3375 Test Method for Column Capacity of ParticulateMixed Bed IonExchange Materials3.Terminology3.1 DefinitionsFor definitions of terms related to water,refer to Terminology D1129.4.Summary of Test Method4.1 This test method consists of exhausting a cartridge ofmixed bed ion exchange material to a specific end point with aninfluent solution of known composition and volume.5.Significance and Use5.1 This test method can be used to evaluate unused mixedbed ion exchange cartridges for conformance to specifications.5.2 This test method provides for the calculation of capacityin terms of the volume of water treated to a conductivity endpoint.5.3 The test method as written assumes that the ion ex-change resins in the cartridge are either partially or fullyconverted to the H+or OH-form.Regeneration of the resins isnot part of this method.5.4 This test method provides for the calculation of capacityon a cartridge basis.5.5 This test method may be used to test different size mixedbed resin cartridges.The flow rate of test water and thefrequency of sampling are varied to compensate for theapproximate volume of resin in the test cartridge.6.Apparatus6.1 Test Assembly(Fig.1),consisting of the following:6.1.1 Cartridge,and pressure vessel,if required.Connec-tions shall be provided at the top and the bottom for theadmission and removal of the ion exchange test water asdescribed in 7.3.6.1.2 Test solution tank.Adequate means of regulating andmeasuring flow through the cartridge shall be provided.If thetest flow rate(8.1)can not be obtained by gravity feed,then apump should be used.6.1.3 Measuring circuit and in-line conductivity cells shallbe as described in Test Methods D1125.A continuous recorderis recommended.7.Reagents and Materials7.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Society,1This test method is under the jurisdiction of ASTM Committee D19 on Waterand is the direct responsibility of Subcommittee D19.08 on Membranes and IonExchange Materials.Current edition approved March 15,2009.Published April 2009.DOI:10.1520/D7513-09.2For 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 C700,West Conshohocken,PA 19428-2959.United States1 where such specifications are available.3Other grades may beused,provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.7.2 Purity of WaterAll reference to water in this testmethod shall be understood to mean Reagent Water Type I orII conforming to Specification D1193.7.3 Ion Exchange Test Water(10 meq/L,or 500 ppm asCaCO3)Prepare a test water containing,in each litre:7.3.1 0.294 g of calcium chloride dihydrate(CaCl2-2H2O),7.3.2 0.336 g of oven-dried(105C)sodium bicarbonate(NaHCO3),and7.3.3 0.120 g of oven-dried(105C)anhydrous magnesiumsulfate(MgSO4).7.4 Asingle test requires approximately 50 Lof this solutionfor each litre of mixed bed ion exchange resin that a cartridgecon