ASTM_D_3373_-_12.pdf

Designation:D337312Standard Test Method forVanadium in Water1This standard is issued under the fixed designation D3373;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 U.S.Department of Defense.1.Scope*1.1 This test method covers the determination of dissolvedand total recoverable vanadium in most waters and wastewaterby graphite furnace atomic absorption spectrophotometry.1.2 The optimum range of this test method is 10 to 200 g/Lof vanadium based on a 20-L sample size.Concentrationshigher than 200 g/L may be determined by proper dilution ofsample.A detection level as low as 4 g/L of vanadium hasbeen reported.1.3 This test method has been used successfully withreagent water,lake water,tap water,river water,condensatefrom a medium Btu coal gasification process,and well water.It is the users responsibility to ensure the validity of this testmethod for waters of untested matrices.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 or regulatory limitations prior to use.1.6 Former Test Method A(Catalytic)was discontinued.Refer to Appendix X1 for historical information.2.Referenced Documents2.1 ASTM Standards:2D1066 Practice for Sampling SteamD1129 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 ConduitsD3919 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 this testmethod refer to Terminology D1129.3.2 Definitions of Terms Specific to This Standard:3.2.1 total recoverable vanadium,ndissolved vanadiumplus that solubilized by acid digestion of particulates andorganics in the sample.4.Summary of Test Method4.1 Vanadium is determined by an atomic absorption spec-trophotometer utilizing a graphite furnace for sample atomiza-tion.4.2 Asample volume of several microlitres,depending uponthe concentration of the analyte,is transferred to a graphitetube housed within an electrical furnace and the system isheated in an inert or reducing atmosphere.The sample isevaporated to dryness,charred(pyrolyzed or ashed)andatomized.4.3 Ground state atoms,produced in atomization,absorb thelight of their spectrum emanating from a source and passingthrough the sample vapor.The amount of light absorbed isproportional to the concentration of the analyte in the sample.4.4 Since the graphite furnace uses the sample much moreefficiently than does flame atomization,the detection of lowconcentrations of the elements of interest in small volumes ispossible.4.5 Finally,the absorption signal produced during atomiza-tion is recorded and compared to those of standards,takenthrough the same process,by means of an analytical curve.4.6 A general guide for graphite furnace applications isgiven in Practice D3919.1This 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 Sept.1,2012.Published September 2012.Originallyapproved in 1975.Last previous edition approved in 2007 as D3373 03(2007)1.DOI:10.1520/D3373-12.2For 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 4.7 Dissolved vanadium is determined after filtration andaddition of HNO3to a pH of 2.4.8 Total recoverable vanadium is determined followingacid digestion and filtration.5.Significance and Use5.1 Vanadium can be found in waste that result fromchemical cleaning of components in which the metal is alloyed.5.2 National Pollutant Discharge Elimination Systems per-mits or other standards,or both,require monitoring pollutantsin waste discharged onto the water shed of,or into,navigablewaters,a