ASTM_D_1688_-_12.pdf

Designation:D168812Standard Test Methods forCopper in Water1This standard is issued under the fixed designation D1688;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.This standard has been approved for use by agencies of the Department of Defense.1.Scope*1.1 These test methods cover the determination of copper inwater by atomic absorption spectrophotometry.Three testmethods are included as follows:Test MethodConcentrationRangeSectionsAAtomic Absorption,Direct0.05 to 5 mg/L7-15BAtomic Absorption,Chelation-Extraction50 to 500 g/L16-24CAtomic Absorption,Graphite Furnace5 to 100 g/L25-331.2 Either dissolved or total recoverable copper may bedetermined.Determination of dissolved copper requires filtra-tion through a 0.45-m(No.325)membrane filter at the timeof collection.In-line membrane filtration is preferable.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system are mathematical conversions and may not beexact equivalents;therefore,each system shall be used inde-pendently of the other.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.For specific hazardstatements,see Note 4,Note 6,Note 10,and Note 16.1.5 Three former photometric test methods were discontin-ued.Refer to Appendix X1 for historical information.2.Referenced Documents2.1 ASTM Standards:2D858 Test Methods for Manganese in WaterD1066 Practice for Sampling SteamD1068 Test Methods for Iron in WaterD1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD1687 Test Methods for Chromium in WaterD1691 Test Methods for Zinc in WaterD1886 Test Methods for Nickel in WaterD2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D19 on WaterD3370 Practices for Sampling Water from Closed ConduitsD3557 Test Methods for Cadmium in WaterD3558 Test Methods for Cobalt in WaterD3559 Test Methods for Lead in WaterD3919 Practice for Measuring Trace Elements in Water byGraphite Furnace Atomic Absorption SpectrophotometryD4841 Practice for Estimation of Holding Time for WaterSamples Containing Organic and Inorganic ConstituentsD5810 Guide for Spiking into Aqueous SamplesD5847 Practice for Writing Quality Control Specificationsfor Standard Test Methods for Water Analysis3.Terminology3.1 Definitions:For definitions of terms used in these testmethods,refer to Terminology D1129.4.Significance and Use4.1 Copper is found in naturally occurring minerals princi-pally as a sulfide,oxide,or carbonate.It makes up approxi-mately 0.01%of the earths crust and is obtained commer-cially from such ores as chalcopyrite(CuFeS2).Copper is alsofound in biological complexes such as hemocyanin.4.2 Copper enters water supplies through the natural processof dissolution of minerals,through industrial effluents,throughits use,as copper sulfate,to control biological growth in somereservoirs and distribution systems,and through corrosion ofcopper alloy water pipes.Industries whose wastewaters maycontain significant concentrations of copper include mining,ammunition production,and most metal plating and finishingoperations.It may occur in simple ionic form or in one of manycomplexes with such groups as cyanide,chloride,ammonia,ororganic ligands.4.3 Although its salts,particularly copper sulfate,inhibitbiological growth such as some algae and bacteria,copper is1These test methods are under the jurisdiction of ASTM Committee D19 onWater and are the direct responsibility of Subcommittee D19.05 on InorganicConstituents in Water.Current edition approved Sept.1,2012.Published September 2012.Originallyapproved in 1959.Last previous edition approved in 2007 as D1688 07.DOI:10.1520/D1688-12.2For 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.*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 considered essential to human nutrition and is not considered atoxic chemical at concentrations normally found in watersupplies.5.Purity of Reagents5.1 Reagent grade chemicals shall be used in all tests.Unless otherwise indicated,it is intended that all reagents shallconform to the specifications of the Committee on AnalyticalReagents of the American Chemical Society,where suchspecifications are available.3Other grades may b