ASTM_D_3558_-_08.pdf

Designation:D355808Standard Test Methods forCobalt in Water1This standard is issued under the fixed designation D3558;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 These test methods cover the determination of dissolvedand total recoverable cobalt in water and wastewater2byatomic absorption spectrophotometry.Three test methods areincluded as follows:Concentration RangeSectionsTest Method AAtomic Absorption,Direct0.1 to 10 mg/L7 to 16Test Method BAtomic Absorption,Chelation-Extraction10 to 1000 g/L17 to 26Test Method CAtomic Absorption,Graphite Furnace5 to 100 g/L27 to 361.2 Test Method A has been used successfully with reagentwater,potable water,river water,and wastewater.Test MethodB has been used successfully with reagent water,potable water,river water,sea water and brine.Test Method C was success-fully evaluated in reagent water,artificial seawater,river water,tap water,and a synthetic brine.It is the analysts responsibilityto ensure the validity of these test methods for other matrices.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.For specific hazardstatements,see 11.7.1,21.10,and 23.10.2.Referenced Documents2.1 ASTM Standards:3D858 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 WaterD1688 Test Methods for Copper 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 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:3.1.1 For definitions of terms used in these test methods,refer to Terminology D1129.3.2 Definitions of Terms Specific to This Standard:3.2.1 total recoverable cobaltan arbitrary analytical termrelating to the recoverable forms of cobalt that are determin-able by the digestion method which is included in the proce-dure.4.Significance and Use4.1 Most waters rarely contain more than trace concentra-tions of cobalt from natural sources.Although trace amounts ofcobalt seem to be essential to the nutrition of some animals,large amounts have pronounced toxic effects on both plant andanimal life.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 such1These 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 Nov.15,2008.Published November 2008.Originallyapproved in 1977.Last previous edition approved in 2003 as D3558 03.DOI:10.1520/D3558-08.2Platte,J.A.,and March,V.M.,“ANew Tool for the Water Chemist,”IndustrialWater Engineering,May 1965.3For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 specifications are available.4Other grades may be used,pro-vided it is first ascertained that the reagent is of sufficientlyhigh purity to permit its use without lessening the accuracy ofthe determination.5.2 Unless otherwise indicated,reference to water shall beunderstood to mean reagent water conforming to SpecificationD1193,Type I.Other reagent water types may be used,provided it is first ascertained that the water is of sufficientlyhigh purity to permit its use without lessening the bias andprecision of the determination.Type II water specified at thetime of the round-robin testing of this test method.6.Sampling6.1 Collect the samples in accor