ASTM_D_5373_-_21.pdf

Designation:D537321Standard Test Methods forDetermination of Carbon,Hydrogen and Nitrogen inAnalysis Samples of Coal and Carbon in Analysis Samplesof Coal and Coke1This standard is issued under the fixed designation D5373;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 Test MethodAcovers the determination of carbon in therange of 54.9%to 84.7%,hydrogen in the range of 3.26%to5.08%,and nitrogen in the range of 0.57%to 1.76%inanalysis samples(8.1)of coal and of carbon in analysissamples of coke in the range of 86.6%to 97.9%.1.1.1 Test Method B covers the determination of carbon inanalysis samples of coal in the range of 57.7%to 84.0%,andcarbon in analysis samples of coke in the range of 86.3%to95.4%.NOTE1The coals included in the interlaboratory studies employed toderive the precision statements for this standard cover ASTM rank ligniteA to low volatile bituminous.Additional information concerning thecomposition of these coals appears in AnnexA4 and AnnexA5.The cokesused in the interlaboratory study employed to derive the precisionstatement for coke for Method A included five each metallurgical(met)cokes and seven each petroleum(pet)cokes,and Method B included anequal number(five each)of met cokes and pet cokes.1.2 All percentages are percent mass fractions unless other-wise noted.1.3 UnitsThe values stated in SI units are to be regardedas standard.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 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:2D121 Terminology of Coal and CokeD346/D346M Practice for Collection and Preparation ofCoke Samples for Laboratory AnalysisD2013 Practice for Preparing Coal Samples for AnalysisD3173 Test Method for Moisture in the Analysis Sample ofCoal and CokeD3176 Practice for Ultimate Analysis of Coal and CokeD3180 Practice for Calculating Coal and Coke Analysesfrom As-Determined to Different BasesD5865 Test Method for Gross Calorific Value of Coal andCokeD7582 Test Methods for Proximate Analysis of Coal andCoke by Macro Thermogravimetric Analysis2.2 ISO Standard:3ISO 5725-6 Accuracy(Trueness and Precision)of Measure-ment Methods and Results Part 6:Use in Practice ofAccuracy Values3.Terminology3.1 For definitions of terms used in this standard,refer toTerminology D121.4.Summary of Test Methods4.1 In Method A,carbon,hydrogen,and nitrogen in coal orcarbon in coke are determined in a single instrumental proce-dure using a furnace operating at temperatures in the range of900 C to 1050 C for carbon,hydrogen,and nitrogen in coalor 950 C to 1150 C for carbon in coke.The quantitativeconversion of the carbon,hydrogen,and nitrogen into theircorresponding gases(CO2,H2O,and NOx)occurs duringcombustion of the sample at an elevated temperature in an1These test methods are under the jurisdiction ofASTM Committee D05 on Coaland Coke and are the direct responsibility of Subcommittee D05.21 on Methods ofAnalysis.Current edition approved April 1,2021.Published April 2021.Originallyapproved in 1993.Last previous edition approved in 2016 as D5373 16.DOI:10.1520/D5373-21.2For 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.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.1atmosphere of oxygen.Combustion products which can inter-fere with the subsequent gas analysis are removed.Oxides ofnitrogen(NOx)are reduced to N2before detection.The carbondioxide,water vapor and elemental nitrogen in the gas streamare determined by appropriate instrumental detection proce-dures.4.2 In Method B,car