1、Designation:D801018Standard Test Method forDetermination of Water Soluble Alkali Content in Coal1This standard is issued under the fixed designation D8010;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A nu
2、mber 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 describes a procedure for the determi-nation of water soluble sodium as sodium oxide(Na2O)andpotassium as potassium oxide(K2
3、O)in the analysis of coalsamples prepared in accordance with Practice D2013.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.3 This test method is derived in part from the
4、 ASMEprocedure water soluble alkalis.21.4 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 re
5、gulatory 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
6、Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D121 Terminology of Coal and CokeD1193 Specification for Reagent WaterD2013 Practice for Preparing Coal Samples for AnalysisD3173 Test Method for Moisture in the Analysis Sample ofCoal and CokeD3302 Test
7、Method for Total Moisture in CoalD3180 Practice for Calculating Coal and Coke Analysesfrom As-Determined to Different BasesD7448 Practice for Establishing the Competence of Labora-tories Using ASTM Procedures in the Sampling andAnalysis of Coal and CokeD7582 Test Methods for Proximate Analysis of Co
8、al andCoke by Macro Thermogravimetric AnalysisE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE832 Specification for Laboratory Filter Papers2.2 ISO Standard:4ISO 5725-6:1994 Accuracy of measurement methods andresultsPart 6:Use in practice of accuracy
9、values3.Terminology3.1 For definitions of terms used in this test method,refer toTerminology D121.4.Summary of Test Method4.1 Sodium and potassium salts are leached from the sampleduring a lengthy digestion with water and a wetting agent.Theconcentrations of sodium and potassium are measured in thef
10、iltered liquid by an appropriate spectrometric technique for theelements sodium and potassium.5.Significance and Use5.1 Results obtained from the test method are used to servea number of interests,including the indication of possibleboiler tube fouling and possible furnace corrosion problems.6.Inter
11、ferences6.1 Several types of interference effects may contribute toinaccuracies in the determination of sodium and potassium.Follow the manufacturers operating guide to develop andapply correction factors to compensate for the interferences.7.Apparatus7.1 Analytical balance,with sensitivity of 0.1 m
12、g.7.2 Digestion Apparatus:7.2.1 Stirring Hotplate and Bars,with operating tempera-ture up to 200 C.7.2.1.1 Erlenmeyer flask with cover,250 mL.1This test method is under the jurisdiction of ASTM Committee D05 on Coaland Coke and is the direct responsibility of Subcommittee D05.21 on Methods ofAnalysi
13、s.Current edition approved Sept.1,2018.Published October 2018.Originallyapproved in 2015.Last previous edition approved in 2016 as D8010 16.DOI:10.1520/D8010-18.2“Coal Fouling and Slagging Parameters.”ASME H-86.Editor E.C.Winegartner,1974.3For referenced ASTM standards,visit the ASTM website,www.ast
14、m.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.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyri
15、ght 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 St
16、andards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 7.2.1.2 Refluxing column(optional).7.2.2 Hot Block Digestion:7.2.2.1 Polycarbonate Bottles,250 mL capacity with anO-ring seal and screw cap,capable of withstanding tempera-tures up to 130 C,the pressure that is developed during thedigestion,and resistant to oxidation.Other types of bottles orvials may be used provided they are capable of withstandingthe temperatures and pressures
