ASTM_D_7614_-_20.pdf

Designation:D761420Standard Test Method forDetermination of Total Suspended Particulate(TSP)Hexavalent Chromium in Ambient Air Analyzed by IonChromatography(IC)and SpectrophotometricMeasurements1This standard is issued under the fixed designation D7614;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 This test method specifies a procedure for the samplingand analysis of airborne particulate matter for hexavalentchromium in ambient air samples.1.2 This method is applicable to the determination ofmasses of 0.40 to 20.0 ng of hexavalent chromium per samplewithout dilution.Detection limits vary by instrumentation.Some laboratories may be able to achieve lower detectionlimits.The lower limit of applicability for this method wasdetermined in a 2019 multi-laboratory detection limit study(1).21.3 This method is applicable to hexavalent chromiummeasurement in the atmosphere from 0.019 to 0.926 ng/m3assuming a 21.6 m3sample volume.The lower range may bedecreased with longer sampling times.The upper range can beincreased using appropriate dilutions.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D1193 Specification for Reagent WaterD1356 Terminology Relating to Sampling and Analysis ofAtmospheresD1357 Practice for Planning the Sampling of the AmbientAtmosphereD3195 Practice for Rotameter CalibrationD4840 Guide for Sample Chain-of-Custody ProceduresE288 Specification for Laboratory Glass Volumetric FlasksE438 Specification for Glasses in Laboratory ApparatusE1154 Specification for Piston or Plunger Operated Volu-metric Apparatus3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method,referto Terminology D1356.3.2 Definitions of Terms Specific to This Standard:3.2.1 acid hardened filters,ncellulose filters which havebeen acid-washed and solvent-rinsed by the manufacturer.3.2.2 cassette,na cartridge designed to contain a filterthrough which air is pulled during sample collection.Cassettesmay be specific to a brand or model of sampler.3.2.3 chain of custody(COC),na document that providesfor the traceable transfer of field samples to the analyticallaboratory.3.2.4 eluent,nthe mobile phase used to transport thesample through the ion chromatograph(IC)system,to includethe UV/Vis detector.3.2.5 field data sheet,na record that provides a referencedocument for information directly related to the sample col-lection event,including pre-and post-calibration data.1This test method is under the jurisdiction of ASTM Committee D22 on AirQuality and is the direct responsibility of Subcommittee D22.03 on AmbientAtmospheres and Source Emissions.Current edition approved March 1,2020.Published May 2020.Originallyapproved in 2012.Last previous edition approved in 2012 as D7614 12.DOI:10.1520/D7614-20.2The boldface numbers in parentheses refer to a 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.3.2.6 quality assurance project plan(QAPP)or projectplan,na document agreed upon by all stakeholders whichclearly delineates all aspects of the monitoring project,toinclude siting of samplers,sampling days and frequency,sampling and analytical protocols and quality assurance ele-ments.4.Summary of Test Method(2-4)4.1 This method captures ambient air particulate by pullinga known volume of ambient air through an acid-washedsodium bicarbonate-impregnated cellulose filter.A knownvolume of air is drawn at a rate of 5.