ASTM_D_5996_-_16.pdf

Designation:D599616Standard Test Method forMeasuring Anionic Contaminants in High-Purity Water byOn-Line Ion Chromatography1This standard is issued under the fixed designation D5996;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 on-line analysis of high-puritywater by the ion chromatography technique.This test methodis applicable for measuring various anionic contaminants inhigh-purity water,typically in the range of 0.01 to 100 g/L.This test method is used to determine the concentration ofacetate,formate,chloride,fluoride,phosphate,nitrate,andsulfate in a continuously flowing sample.The range of the testmethod is only as good as the reagent water available forpreparing standards.At extremely low concentrations,1.0g/L,preparing standards is difficult,and extra care must betaken in their preparation.The sample may have to beconditioned from higher pressures and temperatures to condi-tions that are suitable for use by on-line instruments.1.2 Online sample analysis of flowing streams does not lenditself to collaborative studies due to the nature of the sampleand the possibility of contamination that may result fromhandling the sample as part of the collaborative study.There-fore this standard test method is not based on the results of acollaborative study but is intended to provide the best possibleguidance for doing this type of analysis.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 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 use.2.Referenced Documents2.1 ASTM Standards:2D1066 Practice for Sampling SteamD1129 Terminology Relating to WaterD1192 Guide for Equipment for Sampling Water and Steamin Closed Conduits(Withdrawn 2003)3D1193 Specification for Reagent WaterD2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D19 on WaterD3370 Practices for Sampling Water from Closed ConduitsD3864 Guide for On-Line Monitoring Systems for WaterAnalysisD4453 Practice for Handling of High Purity Water SamplesD5542 Test Methods for Trace Anions in High Purity Waterby Ion ChromatographyD5810 Guide for Spiking into Aqueous SamplesD5847 Practice for Writing Quality Control Specificationsfor Standard Test Methods for Water Analysis3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this standard,refer toTerminology D1129.3.2 Definitions of Terms Specific to This Standard:3.2.1 analytical column,na column used to separate theanions of interest.3.2.2 analytical column set,na combination of one ormore guard columns followed by one or more analyticalcolumns.3.2.3 anion suppressor device,na device that is placedbetween the analytical columns and the detector.3.2.3.1 DiscussionIts purpose is to inhibit detector re-sponse to the ionic constituents in the eluant,so as to lower the1This test method is under the jurisdiction of ASTM Committee D19 on Waterand is the direct responsibility of Subcommittee D19.03 on Sampling Water andWater-Formed Deposits,Analysis of Water for Power Generation and Process Use,On-Line Water Analysis,and Surveillance of Water.Current edition approved Feb.15,2016.Published June 2016.Originallyapproved in 1996.Last previous edition approved in 2009 as D5996 05(2009).DOI:10.1520/D5996-16.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 detector background and at the same time enhance detectorresponse to the ions of interest.3.2.4 breakthrough volume,nthe maximum sample vol-ume that can be passed through a concentrator column beforethe least tightly bound ion of interest is eluted.3.2.4.1 DiscussionAll of the columns in series contributeto the overall capacity of the analytical column set.3.2.5 concentrator column,nan ion exchange columnused to concentrate the ions of interest and thereby increasemethod sensitivity.3.2.6 eluant,nthe ionic mobile phase used to transport thesample through the analytical column.3.2.7 guard column,na column used before the analyticalcolumn to protect it from contaminants,such as particulatematter or ionic species that may chemically foul the resins anddegrade their performance.3