ASTM_D_7551_-_10_2015.pdf

Designation:D755110(Reapproved 2015)Standard Test Method forDetermination of Total Volatile Sulfur in GaseousHydrocarbons and Liquefied Petroleum Gases and NaturalGas by Ultraviolet Fluorescence1This standard is issued under the fixed designation D7551;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 test method covers the determination of totalvolatile sulfur in gaseous hydrocarbons,Liquefied PetroleumGases(LPG)and Liquefied Natural Gas(LNG).It is applicableto analysis of natural gaseous fuels,process intermediates,finalproduct hydrocarbons and generic gaseous fuels containingsulfur in the range of 1 to 200 mg/kg.Samples can also betested at other total sulfur levels using either pre-concentrationmethods or sample dilution using a diluent gas.The method-ology for preconcentration and dilution techniques is notcovered in this test method.The precision statement does notapply if these techniques are used in conjunction with this testmethod.The diluent gas,such as UHP nitrogen,zero nitrogenor zero air,shall not have a significant total sulfur concentra-tion.1.2 This test method may not detect sulfur compounds thatdo not volatilize under the conditions of the test.1.3 This test method covers the laboratory determinationand the at-line/on-line determination of total volatile sulfur ingaseous fuels,LPG,and LNG.1.4 This test method is applicable for total volatile sulfurdetermination in gaseous hydrocarbons,LPG,and LNG con-taining less than 0.35 mole%halogen(s).1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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.See Sections 4.1,7.3,7.4,11.2,and Section 8.2.Referenced Documents2.1 ASTM Standards:2D1070 Test Methods for Relative Density of Gaseous FuelsD1072 Test Method for Total Sulfur in Fuel Gases byCombustion and Barium Chloride TitrationD1265 Practice for Sampling Liquefied Petroleum(LP)Gases,Manual MethodD3588 Practice for Calculating Heat Value,CompressibilityFactor,and Relative Density of Gaseous FuelsD3609 Practice for Calibration Techniques Using Perme-ation TubesD4150 Terminology Relating to Gaseous FuelsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD4784 Specification for LNG Density Calculation ModelsD5287 Practice for Automatic Sampling of Gaseous FuelsD5503 Practice for Natural Gas Sample-Handling and Con-ditioning Systems for Pipeline InstrumentationD5504 Test Method for Determination of Sulfur Compoundsin Natural Gas and Gaseous Fuels by Gas Chromatogra-phy and ChemiluminescenceD6228 Test Method for Determination of Sulfur Compoundsin Natural Gas and Gaseous Fuels by Gas Chromatogra-phy and Flame Photometric DetectionD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD7166 Practice for Total Sulfur Analyzer Based On-line/At-line for Sulfur Content of Gaseous FuelsE617 Specification for Laboratory Weights and PrecisionMass StandardsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodF307 Practice for Sampling Pressurized Gas for Gas Analy-sis1This test method is under the jurisdiction ofASTM Committee D03 on GaseousFuels and is the direct responsibility of Subcommittee D03.05 on Determination ofSpecial Constituents of Gaseous Fuels.Current edition approved Nov.1,2015.Published December 2015.Originallyapproved in 2010.Last previous edition approved as D7551-10.DOI:10.1520/D755110R15.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.2 ASTM Manuals:3ASTM MNL 72.3 GPA Standards:4GPA 2166 Obtaining Natural Gas Samples for Analysis byGas ChromatographyGPA 2174 Obtaining Liquid Hydrocarbon Samples forAnalysis by Gas Chromatography3.Terminology3.1 Defintions:For definitions of at-line instrument and on-line instrument seeTerminology D4150.3.2 Acronyms:3.2.1 LNGliquefied natural gas3.2.2 LPGliquefied petroleum gas3.2.3 NISTNational Institute of Standards and Technology3.2.4 NMiNederlands Meetinstituut3.2.5 NTRMNIST traceable reference material3.2.6 QAquality assurance3.2.7 QCquality control3.2.8 SO2ground state sulfur dioxide3.2.9 SO2*excited state sulfur dio