1、Designation:D658112Standard Test Methods forBromate,Bromide,Chlorate,and Chlorite in Drinking Waterby Suppressed Ion Chromatography1This standard is issued under the fixed designation D6581;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revi
2、sion,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 These multi-test methods cover the determination of theoxyhalideschlorite,bromate,and chlorate,and bromide
3、,inraw water,finished drinking water and bottled(non-carbonated)water by chemically and electrolytically sup-pressed ion chromatography.The ranges tested using these testmethods for each analyte were as follows:RangeSectionsTest Method A:Chemically SuppressedIon Chromatography8 to 20Chlorite5 to 500
4、 g/LBromate1 to 25 g/LBromide5 to 250 g/LChlorate5 to 500 g/LTest Method B:ElectrolyticallySuppressed IonChromatography21 to 31Chlorite20 to 1000 g/LBromate1 to 30 g/LBromide20 to 200 g/LChlorate20 to 1000 g/L1.1.1 The upper limits may be extended by appropriatesample dilution or by the use of a sma
5、ller injection volume.Other ions of interest,such as fluoride,chloride,nitrite,nitrate,phosphate,and sulfate may also be determined using these testmethods.However,analysis of these ions is not the object ofthese test methods.1.2 It is the users responsibility to ensure the validity ofthese test met
6、hods for waters of untested matrices.1.3 These test methods are technically equivalent with PartB of U.S.EPA Method 300.1,2titled“The Determination ofInorganic Anions in Drinking Water by Ion Chromatography.”1.4 The values stated in either SI or inch-pound units are tobe regarded as the standard.The
7、 values given in parenthesesare for information only.1.5 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 r
8、egulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3D1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D19 on WaterD3370 Practices for Sampling Water from Close
9、d ConduitsD3856 Guide for Management Systems in LaboratoriesEngaged in Analysis of WaterD5810 Guide for Spiking into Aqueous SamplesD5847 Practice for Writing Quality Control Specificationsfor Standard Test Methods for Water Analysis3.Terminology3.1 DefinitionsFor definitions of terms used in the te
10、stmethods,refer to Terminology D1129.3.2 Definitions of Terms Specific to This Standard:3.2.1 analytical columnthe ion exchange column used toseparate the ions of interest according to their retentioncharacteristics prior to detection.3.2.2 analytical column seta combination of one or moreguard colu
11、mns,followed by one or more analytical columnsused to separate the ions of interest.All of the columns in seriesthen contribute to the overall capacity and resolution of theanalytical column set.3.2.3 eluentthe ionic mobile phase used to transport thesample through the chromatographic system.3.2.4 g
12、uard columna column used before the analyticalcolumn to protect it from contaminants,such as particulates orirreversibly retained material.1These test methods are under the jurisdiction of ASTM Committee D19 onWater and are the direct responsibility of Subcommittee D19.05 on InorganicConstituents in
13、 Water.Current edition approved March 1,2012.Published April 2012.Originallyapproved in 2000.Last previous edition approved in 2008 as D6581 08.DOI:10.1520/D6581-12.2U.S.EPA 300.1,Cincinnati,OH,1997.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at
14、 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 3.2.5 ion chromatographya form of liquid chromatogra-phy
15、in which ionic constituents are separated by ion exchangethen detected by an appropriate detection means,typicallyconductance.3.2.6 resolutionthe ability of an analytical column toseparate the method analytes under specific test conditions.3.2.7 suppressor devicean ion exchange based device thatis p
16、laced between the analytical column set and the conduc-tivity detector.Its purpose is to minimize detector response tothe ionic constituents in the eluent,in order to lower back-ground conductance;and at the same time enhance the con-ductivity detector response of the ions of interest.3.2.7.1 chemical suppressionthe use of an acid solution tothe suppressor in order to suppress the background conductiv-ity.3.2.7.2 electrolytic suppressor deviceelectrolytic suppres-sion is an ion exchange device t
