ASTM_D_6994_-_15.pdf

Designation:D699415Standard Test Method forDetermination of Metal Cyanide Complexes in Wastewater,Surface Water,Groundwater and Drinking Water UsingAnion Exchange Chromatography with UV Detection1This standard is issued under the fixed designation D6994;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.Scope*1.1 This test method covers the determination of the metalcyanide complexes of iron,cobalt,silver,gold,copper andnickel in waters including groundwaters,surface waters,drink-ing waters and wastewaters by anion exchange chromatogra-phy and UV detection.The use of alkaline sample preservationconditions(see 10.3)ensures that all metal cyanide complexesare solubilized and recovered in the analysis(1-3).21.2 Metal cyanide complex concentrations between 0.20 to200 mg/L may be determined by direct injection of the sample.This range will differ depending on the specific metal cyanidecomplex analyte,with some exhibiting greater or lesser detec-tion sensitivity than others.Approximate concentration rangesare provided in 12.2.Concentrations greater than the specificanalyte range may be determined after appropriate dilution.This test method is not applicable for matrices with high ionicstrength(conductivity greater than 500 meq/L as Cl)and TDS(greater than 30 000 mg/L),such as ocean water.1.3 Metal cyanide complex concentrations less than 0.200mg/L may be determined by on-line sample preconcentrationcoupled with anion exchange chromatography as described in11.3.This range will differ depending on the specific metalcyanide complex analyte,with some exhibiting greater orlesser detection sensitivity than others.Approximate concen-tration ranges are provided in 12.2.The preconcentrationmethod is not applicable for silver and copper cyanide com-plexes in matrices with high TDS(greater than 1000 mg/L).1.4 The test method may also be applied to the determina-tion of additional metal cyanide complexes,such as those ofplatinum and palladium.However,it is the responsibility of theuser of this standard to establish the validity of the test methodfor the determination of cyanide complexes of metals otherthan those in 1.1.1.5 The presence of metal complexes within a sample maybe converted to Metal CN complexes and as such,are alteredwith the use of this method.This method is not applicable tosamples that contain anionic complexes of metals that areweaker than cyanide complexes of those metals.1.6 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard.1.7 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.For specific hazardstatements,refer to Section 9.2.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 Closed 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 AnalysisD6696 Guide for Understanding Cyanide Species3.Terminology3.1 Definitions:3.1.1 For a definition of terms used in this standard,refer toTerminology D1129.3.2 Definitions of Terms Specific to This Standard:1This test method is under the jurisdiction of ASTM Committee D19 on Waterand is the direct responsibility of Subcommittee D19.05 on Inorganic Constituentsin Water.Current edition approved Oct.1,2015.Published October 2015.Originallyapproved in 2004.Last previous edition approved in 2010 as D6994 10.DOI:10.1520/D6994-15.2The boldface numbers in parentheses refer to the list of references at the end ofthis standard.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 website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.1 anion exchange chromatography,na type of liquidchromatography in which anionic analytes are separated bydifferential retention on an anion exchange resin and detectedby an appropriate detection mechanism.3.2.2 eluent,nthe liquid mobile phase used in anionex