ASTM_D_7183_-_18ae1.pdf

Designation:D718318a1Standard Test Method forDetermination of Total Sulfur in Aromatic Hydrocarbons andRelated Chemicals by Ultraviolet Fluorescence1This standard is issued under the fixed designation D7183;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.1NOTESection 15.1.1 was editorially corrected in January 2019.1.Scope*1.1 This test method covers the determination of sulfur inaromatic hydrocarbons,their derivatives,and related chemi-cals.1.2 This test method is applicable to samples with sulfurconcentrations to 10 mg/kg.The limit of detection(LOD)is0.03 mg/kg S and the limit of quantitation(LOQ)is 0.1 mg/kgS.With careful analytical technique,this method can be used tosuccessfully analyze concentrations below the current scope(see Appendix X1).NOTE1LOD and LOQ were calculated using data inASTM ResearchReport RR:D16-1060.1.3 The following applies for the purposes of determiningthe conformance of the test results using this test method toapplicable specifications,results shall be rounded off in accor-dance with the rounding-off method of Practice E29.1.4 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.For specific hazard statements,see Section 9.1.6 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:2D1555 Test Method for Calculation of Volume and Weightof Industrial Aromatic Hydrocarbons and CyclohexaneD3437 Practice for Sampling and Handling Liquid CyclicProductsD6809 Guide for Quality Control and Quality AssuranceProcedures for Aromatic Hydrocarbons and Related Ma-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 Other DocumentsOSHA Regulations,29 CFR paragraphs 1910.1000 and1910.120033.Terminology3.1 oxidative pyrolysis,na process in which a sample iscombusted in an oxygen-rich atmosphere at high temperatureto break down the components of the sample into elementaloxides.3.2 ultraviolet fluorescence,nradiation in the region of theelectromagnetic spectrum including wavelength from 100 to3900A that excites SO2to(SO2*).4.Summary of Test Method4.1 A specimen is either directly injected or placed in asample boat.The boat is then inserted into a high temperaturecombustion tube where the sulfur is oxidized to sulfur dioxide(SO2)in an oxygen-rich atmosphere.Water produced duringthe sample combustion is removed and the sample combustiongases are next exposed to ultraviolet(UV)light.The SO21This test method is under the jurisdiction of ASTM Committee D16 onAromatic,Industrial,Specialty and Related Chemicals and is the direct responsi-bility of Subcommittee D16.04 on Instrumental Analysis.Current edition approved Nov.1,2018.Published November 2018.Originallyapproved in 2007.Last previous edition approved in 2018 as D7183 18.DOI:10.1520/D7183-18aE01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.*A Summary of Changes section appears at the end of this standardCopyright 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.1 absorbs the energy from the UV light and is converted toexcited sulfur dioxide(SO2*).As it returns to a stable state,light is emitted and detected by a photomultiplier tube and theresulting signal is a measure of the sulfur contained in thespecimen.5.Significance and Use5.1 Some process catalysts used in petroleum and chemicalrefining can be poisoned when t