1、Designation:D268795(Reapproved 2007)1Standard Practices forSampling Particulate Ion-Exchange Materials1This standard is issued under the fixed designation D2687;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revisio
2、n.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEWarning notes were moved into the standard text editorially in January 2008.1.Scope1.1 These practices2cover procedures for obtaining repre-s
3、entative samples of ion-exchange materials.The followingpractices are included:SectionsPractice ASampling from a Single Package andMultiple Package Lots or Shipments4 to 11Practice BSampling from Fixed Bed Ion-ExchangeEquipment Having Unrestricted Head Room12 to 16Practice CSampling from Fixed Bed I
4、on-ExchangeEquipment Having Restricted Head Room17 to 211.2 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 o
5、f regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3C183 Practice for Sampling and the Amount of Testing ofHydraulic CementD1129 Terminology Relating to Water3.Terminology3.1 DefinitionsCertain terms in these practices that relateto ion exchange are defined in Terminology
6、 D1129.PRACTICE ASAMPLING FROM A SINGLEPACKAGE AND MULTIPLE PACKAGE LOTS ORSHIPMENTS4.Summary of Practice4.1 A hollow,sample-probe guide that is comprised ofmating threaded sections and that can be extended to anyconvenient length by the addition of more sections,is insertedinto an ion-exchange unit
7、.A sampling tube is inserted throughthe probe guide and is connected to a vacuum source.Ion-exchange material is removed by eduction.Acore sampler alsomay be used.5.Significance and Use5.1 This practice will be used most frequently to samplematerials as received from the manufacturer in the original
8、shipping container and prior to any resin-conditioning proce-dure.Since certain ion-exchange materials are supplied by themanufacturer in the dry or free-flowing state whereas others aresupplied moist,it is necessary to employ two different sam-pling devices.Therefore,this practice is divided into S
9、amplingProcedureDry or Free-Flowing Material(Section 8),andSampling ProcedureMoist Material(Section 9).5.2 Once the sample is obtained,it is necessary to protectthe ion-exchange materials from changes.Samples should beplaced in sealable,gasproof containers immediately.6.Apparatus6.1 Sampling Devices
10、,as shown in Fig.1 and Fig.2.NOTE1The sampling devised described in Fig.2 is the same as thatused in Practice C183.6.2 Sealable,Gasproof Containers,for sample storage.6.3 Sample Quartering Materials A 0.5 by 0.5 m(20 by20 in.)sheet of glazed paper,oil cloth,or flexible plastic film.7.Kind and Number
11、 of Samples7.1 For a representative sample from a single package,aminimum of three probes or increments should be taken withthe sampling device.7.2 For a representative sample from a multiple package lotor shipment:7.2.1 If the markings on the package indicate the material tobe sampled is from a sin
12、gle lot(batch or manufacturing run),the number of packages selected shall be not less than 10%ofthe packages received.When less than 30 packages arereceived,a minimum of three packages shall be chosen atrandom for sampling.If a single lot contains more than 301These practices are under the jurisdict
13、ion of ASTM Committee D19 on Waterand are the direct responsibility of Subcommittee D19.08 on Membranes and IonExchange Materials.Current edition approved Dec.1,2007.Published January 2008.Originallyapproved in 1968.Last previous edition approved in 2001 as D2687 95(2001).DOI:10.1520/D2687-95R07E01.
14、2These practices were developed from activities within ASTM Committee D19.3For 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
15、website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 packages and the order of filling is designated on the packages,the first,last,and middle packages shall be sampled.If theresults of the analysis of these three samples agree within
16、thelimits of precision of the test methods used,further samplesfrom the lot need not be taken.If they are not in agreement,additional samples may be taken at the option of the partiesconcerned.When the entire shipment oran entire lot consists ofthree packages or less,a sample shall be taken from eachpackage.The number of samples taken with the samplingdevice should not be less than three per individual package.7.2.2 If the shipment consists of more than one lot(batch ormanufacturing run)of mater