1、Designation: D 7513 09Standard Test Method forCapacity of Mixed Bed Ion Exchange Cartridges1This standard is issued under the fixed designation D 7513; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A nu
2、mber 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
3、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 deter
4、mine 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 there
5、sponsibility 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:2D 1125 Test Methods for Electrical Conductivity and Re-sistivity of WaterD 1129 Terminolo
6、gy Relating to WaterD 1193 Specification for Reagent WaterD 2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D19 on WaterD 3375 Test Method for Column Capacity of ParticulateMixed Bed IonExchange Materials3. Terminology3.1 Definitions: For definitions of t
7、erms related to water,refer to Terminology D 1129.4. 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 use
8、d 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 cartridg
9、e 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 tes
10、t 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 t
11、headmission 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 circui
12、t and in-line conductivity cells shallbe as described in Test Methods D 1125.Acontinuous 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 specifica
13、tions 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
14、April 2009.2For 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.1Copyright ASTM International, 100 Barr Harbor Dri
15、ve, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 WaterA
16、ll reference to water in this testmethod shall be understood to mean Reagent Water Type I orII conforming to Specification D 1193.7.3 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.
17、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 cartridgecontains.8. Procedure8.1 Measure the outside diam
18、eter and length of the ionexchange cartridge. Calculate the overall cartridge volume (inlitres) as follows:Vc5p D2L4! 1000!where:D = the cartridge diameter, in cmL = the cartridge length, in cm8.2 Using the cartridge volume calculated in 8.1, calculatethe test flow rate (in mL/min) as follows:Q 5 30
19、0Vcwhere:Vc= cartridge volume, in litresNOTE 1For multitube cartridges the volume is the sum of the volumesof all the tubes.8.3 Slowly introduce reagent water at the bottom of thecartridge until the cartridge is full to expel air. Allow water tostand in the cartridge for 124 hours to “condition” the
20、 resinprior to the test.8.4 Slowly introduce test water. Increase the flow rate Q tothe value determined in 9.1, adjusting the rate as required witha valve or other flow restriction in the effluent line.8.5 Measure and record the effluent conductivity each volu-metric increment equal to 2 Vc. Contin
21、ue until the 1.0 S/cmvalue is reached, then record the volume of test water pro-cessed to a 1.0 S/cm endpoint (V1) in litres.8.6 After reaching 1.0 S/cm, take conductivity readingsevery 0.5 Vcuntil a reading greater than 50.0 S/cm (20 000ohm-cm) is obtained.8.7 Continue the readings every minute unt
22、il two successiveproduct conductivity readings exceed 50.0 S/cm (20 000ohm-cm). Stop the flow of test water and record the total testvolume corresponding to the first of two successive 50.0 S/cmreadings as the total volume (VT) of test water used, in litres.9. Calculation9.1 The operating capacity i
23、s calculated on a cartridge basisusing a conductivity end point.9.2 Calculate the operating capacity to the conductivity endpoint as follows:Capacity, meq/cartridge 5 C 3 VT3Reagent Chemicals, American Chemical Society Specifications, AmericanChemical Society, Washington, DC. For Suggestions on the
24、testing of reagents notlisted by the American Chemical Society, see Annual Standards for LaboratoryChemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeiaand National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,MD.FIG. 1 Typical Apparatus for Performance Tes
25、ting of Mixed-Bed Ion Exchange CartridgesD7513092where:C = concentration of total electrolytes in the test waterexpressed in milliequivalents per litre as described in7.3, andVT= volume of test water used, per cartridge, litres.This capacity may be converted to other measurement units asdesired.NOTE
26、 2Other end points may be agreed upon. When this is done thespecies and level selected should be specified with the results.10. Report10.1 The report of results of this test method should includenot only the capacity as calculated above but the end pointused. For certification purposes the averaging
27、 of results fromthree separate samples is customary.11. Precision and Bias11.1 The precision and bias for this method is expected to bethe same as for Test Method D 3375, upon which it is based.The collaborative study for Test Method D 3375 involved sixlaboratories, six operators, and three replicat
28、e determinationson one material, IRN-150 mixed bed resin.11.2 The single-operator precision, in a given laboratory, forthis test method is equal to 62.3 % of the column capacityexpressed as milliequivalents per cartridge.11.3 The precision of this test method, within its designatedrange, may be expr
29、essed as follows:ST 5 0.168 0.0208Xwhere:ST= overall precision in meq/mL, andX = mixed bed cartridge capacity expressed as meq/mLfor a conductivity end point.11.4 Bias cannot be determined as in Test Method D 3375since known standards are not available.12. Quality Control12.1 In the analysis of ion
30、exchange resins, it is not possibleto prepare a known standard resin for comparison with theactual samples. Therefore it is impossible to test the accuracyof the results, and the method does not include a bias statement.12.2 Analysts are expected to run replicate samples todetermine if the results a
31、re within the expected precision statedin Section 11.12.3 Analysis of the cartridge effluent is subject to thequality control requirements of the referenced analyticalmethod.13. Keywords13.1 cartridge capacity; conductivity; ion exchange; mixedbed cartridgeASTM International takes no position respec
32、ting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This sta
33、ndard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM Internati
34、onal Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below
35、.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D7513093
