ASTM_D_4382_-_12.pdf

Designation:D438212Standard Test Method forBarium in Water,Atomic Absorption Spectrophotometry,Graphite Furnace1This standard is issued under the fixed designation D4382;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 dissolvedand total recoverable barium in most waters and wastewaters.1.2 This test method was evaluated in the range from 33.5 to132 g/L of barium.The range can be increased or decreasedby varying the volume of sample injected or the instrumentalsettings.High concentrations may be diluted but preferablyshould be analyzed by direct aspiration atomic absorptionspectrophotometry.1.3 This test method has been used successfully with wastetreatment plant effluent water,lake water,filtered tap water,and well water.It is the responsibility of the analyst todetermine the suitability of the test method for other 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 of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D858 Test Methods for Manganese in WaterD1068 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 WaterD1886 Test Methods for Nickel in WaterD2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D19 on WaterD2972 Test Methods for Arsenic in WaterD3373 Test Method for Vanadium in WaterD3557 Test Methods for Cadmium in WaterD3558 Test Methods for Cobalt in WaterD3559 Test Methods for Lead in WaterD3859 Test Methods for Selenium in WaterD3866 Test Methods for Silver in WaterD3919 Practice for Measuring Trace Elements in Water byGraphite Furnace Atomic Absorption SpectrophotometryD4691 Practice for Measuring Elements in Water by FlameAtomic 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 this test method,referto Terminology D1129.3.2 Definitions of Terms Specific to This Standard:3.2.1 total recoverable barium,nan arbitrary analyticalterm relating to the recoverable forms of barium that aredeterminable by the digestion method which is included in thistest method.4.Summary of Test Method4.1 Barium is determined by an atomic absorption spectro-photometer used in conjunction with a graphite furnace.Asample is placed in a graphite tube,evaporated to dryness,charred(pyrolyzed or ashed),and atomized.The absorptionsignal produced during atomization may be recorded andcompared with values obtained from standards that have beencarried through the same process.This facilitates interpolationof the level of barium in the solution being analyzed.Since thegraphite furnace uses the sample much more efficiently thanflame atomization,the detection of low concentrations in smallsample volumes is possible.NOTE1The same graphite furnace procedure may be applicable todetermination of arsenic(see Test Methods D2972),cadmium(see Test1This 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 1984.Last previous edition approved in 2002 as D4382 95(2007)E01.DOI:10.1520/D4382-12.2For 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 Methods D3557),chromium(see Test Methods D1687),cobalt(see TestMethods D3558),copper(see Test Methods D1688),iron(see TestMethods D1068),lead(see Test Methods D3559),manganese(see TestMethods D858),nickel(see Test Methods D1886),selenium(see TestMethods D3859),silver(see Test Methods D3866),and vanadium(seeTest Method D3373).4.2 Dissolved barium is determined on a sample filteredthrough a 0.45-m membrane filter.The definition of dissolvedbarium is arbitrary since ver