ASTM_D_4856_-_11.pdf

Designation:D485611Standard Test Method forDetermination of Sulfuric Acid Mist in WorkplaceAtmospheres Collected on Mixed Cellulose Ester Filters(IonChromatographic Analysis)1This standard is issued under the fixed designation D4856;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 ion chromatographic test method describes thedetermination of sulfuric acid mist in air samples collectedfrom workplace atmospheres on a mixed cellulose ester(MCE)filter.NOTE1Other filter types such as quartz fiber,polytetrafluoroethylene(PTFE),and polyvinyl chloride(PVC)filters are also suitable.1.2 The lower detection limit of this test method is 0.001mg/sample or 0.017 mg/m3of sulfuric acid(H2SO4)mist in 60L of air sampled at 1 L/min.1.3 This test method is subject to interference from solubleand partially soluble sulfate salts.Other sulfur-containingcompounds can be oxidized to sulfate and also interfere.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 No detailed instrument operating instructions are pro-vided because of differences among various makes and modelsof ion chromatography(IC)systems.Instead,the analyst shallfollow the instructions provided by the manufacturer of theparticular instrument,analytical column,and suppressors used.1.6 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 specificprecautionary statements,see Section 9.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterD1356 Terminology Relating to Sampling and Analysis ofAtmospheresD1914 Practice for Conversion Units and Factors Relating toSampling and Analysis of AtmospheresD4327 Test Method for Anions in Water by Suppressed IonChromatographyE200 Practice for Preparation,Standardization,and Storageof Standard and Reagent Solutions for Chemical Analysis2.2 ISO3and European Standards4:ISO 648 Laboratory glasswareOne Mark pipettesISO 7708 Air qualityParticle size fraction definitions forhealth-related samplingISO1042 Laboratory glasswareOne-mark volumetricflasksEN 482 Workplace atmospheresGeneral requirements forthe performance of procedures for the measurement ofchemical agents.EN 1540 Workplace atmospheresTerminologyEN 13890 Workplace atmospheresProcedures for measur-ing metals and metalloids in airborne particlesRequirements and test methods3.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,refer to Terminology D1356 and EN 1540.3.2 Definitions of Terms Specific to This Standard:3.2.1 eluentionic mobile phase used to transport thesample through the exchange columns.3.2.2 resolutionability of a column to separate constitu-ents under specified test conditions.1This test method is under the jurisdiction of ASTM Committee D22 on AirQuality and is the direct responsibility of Subcommittee D22.04 on Workplace AirQuality.Current edition approved Sept.15,2011.Published September 2011.Originallyapproved in 1988.Last previous edition approved in 2004 as D4856-99(2004).DOI:10.1520/D4856-11.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from European Committee for Standardization(CEN),AvenueMarnix 17,B-1000,Brussels,Belgium,http:/www.cen.eu.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Summary of Test Method4.1 A known volume of air is drawn through mixed cellu-lose ester membrane filter-mounted in an appropriate airsampler.Examples are,but not limited to:inhalable samplers,25-mm 3-piece,and 37-mm 3-piece cassettes supported by aback-up pad or screen.54.2 The sulfuric acid collected on the filter is desorbed withD1193 Type 1 water.An aliquot of the desorbed samplesolution is injected into an ion chromatograph to determine thesulfate ion concentration.5.Significance and Use5.1 Sulfuric acid is used in the manufacture of fertilizer,explosives,dyestuffs,other acids,parchment paper,glue,leadacid batteries,textiles,etc.,and in the pickling of metals.5.2 This test method has been found to be satisfactory in themeasurement of sulfuric acid for comparison with relevantoccupational exposure limits.6.Interferences6.1 Soluble or partially soluble sulfate salts,for example,sodium or calcium