1、Designation:D757318a1Standard Test Method forTotal Carbon and Organic Carbon in Water by HighTemperature Catalytic Combustion and Infrared Detection1This standard is issued under the fixed designation D7573;the number immediately following the designation indicates the year oforiginal adoption or,in
2、 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.1NOTEThe research report footnote to Section 15 was editorially updated in January 2019.1.Scope1.1 T
3、his test method covers the determination of totalcarbon(TC),inorganic carbon(IC),total organic carbon(TOC),dissolved organic carbon(DOC),and non-purgableorganic carbon(NPOC)in drinking water,groundwater,sur-face water,wastewater,and seawater in the range from 0.5mg/L to 50 mg/L.Concentrations of 504
4、000 mg/L of carbonmay be determined by automated injection of less samplevolume or by sample dilution.Alternatively,use less samplevolume and calibrate at higher concentrations.1.2 The sample is injected into a tube heated at 680C.Thesample converts into a gaseous phase and forced through alayer of
5、catalyst ensuring conversion of all carbon containingcompounds to CO2.A non-dispersive infrared(NDIR)detectormeasures the resulting CO2.1.3 For TOC and DOC analysis a portion of the sample isinjected to determine TC or dissolved carbon(DC).A portionof the sample is then acidified and purged to remov
6、e the IC.The purged inorganic carbon is measured as TIC,or DIC.TOCor DOC is calculated by subtracting the inorganic fraction fromthe total carbon:TOC5 TC2 IC(1)1.4 For NPOC analysis a portion of sample is acidified andpurged to remove IC.The purged sample is then injected todetermine NPOC.1.5 This t
7、est method is applicable to the matrices andconcentrations validated in the inter-laboratory study.It is theusers responsibility to ensure the validity of this test methodfor waters of untested matrices and different concentrationranges.1.6 This test method is applicable only to carbonaceousmatter i
8、n the sample that can be introduced into the reactionzone.The syringe needle or injector opening size generallylimits the maximum size of particles that can be so introduced.1.7 In addition to laboratory analyses,this test method maybe applied to stream monitoring.1.8 The values stated in SI units a
9、re to be regarded asstandard.No other units of measurement are included in thisstandard.1.9 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 environmenta
10、l practices and deter-mine the applicability of regulatory limitations prior to use.1.10 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,Gui
11、des and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1129 Terminology Relating to WaterD1192 Guide for Equipment for Sampling Water and Steamin Closed Conduits(Withdrawn 2003)3D1193 Specification for Reage
12、nt WaterD2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D19 on WaterD3370 Practices for Sampling Water from Flowing ProcessStreamsD4448 Guide for Sampling Ground-Water Monitoring WellsD5847 Practice for Writing Quality Control Specificationsfor Standard
13、Test Methods for Water AnalysisD6538 Guide for Sampling Wastewater With AutomaticSamplers1This test method is under the jurisdiction of ASTM Committee D19 on Waterand is the direct responsibility of Subcommittee D19.06 on Methods forAnalysis forOrganic Substances in Water.Current edition approved De
14、c.15,2018.Published January 2019.Originallyapproved in 2009.Last previous edition approved in 2018 as D7573 18.DOI:10.1520/D7573-18AE01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume inform
15、ation,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was develo
16、ped 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.1 D6759 Practice for Sampling Liquids Using Grab and Dis-crete Depth Samplers3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this standard,refer toTerminology D1129.3.2 Definitions of Terms Specific to Th
