1、Designation:D633412(Reapproved 2017)1Standard Test Method forSulfur in Gasoline by Wavelength Dispersive X-RayFluorescence1This standard is issued under the fixed designation D6334;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the
2、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 original publication date in Footnote 1 was corrected editorially in June 2018.1.Scope1.1 This test method covers the
3、 quantitative determinationof total sulfur in gasoline and gasoline-oxygenate blends.ThePooled Limit of Quantitation(PLOQ)was determined to be15 mgkg.Therefore,the practical range for this test method isfrom 15 mgkg to 940 mg kg.NOTE1This concentration range is based on that used in theinterlaborato
4、ry round robin,which shows that the range of sulfur in theround robin samples was from 1.5 mg kg to 940 mg kg;however,below15 mg kg,the reproducibility approaches 100%of the concentration.1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is the
5、responsibility 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.1.3 The values stated in SI units are to be regarded as thestandard.The preferred units are mg/kg sulfur.1.4 This in
6、ternational 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)C
7、ommittee.2.Referenced Documents2.1 ASTM Standards:2D2622 Test Method for Sulfur in Petroleum Products byWavelength Dispersive X-ray Fluorescence SpectrometryD3210 Test Method for Comparing Colors of Films fromWater-Emulsion Floor PolishesD4045 Test Method for Sulfur in Petroleum Products byHydrogeno
8、lysis and Rateometric ColorimetryD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD4294 Test Method for Sulfur in Petroleum and PetroleumProducts by Energy Dispersive X-ray Fluorescence Spec-trometryD5453 Tes
9、t Method for Determination of Total Sulfur inLight Hydrocarbons,Spark Ignition Engine Fuel,DieselEngine Fuel,and Engine Oil by Ultraviolet FluorescenceD5842 Practice for Sampling and Handling of Fuels forVolatility MeasurementD5854 Practice for Mixing and Handling of Liquid Samplesof Petroleum and P
10、etroleum ProductsD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD6792 Practice for Quality Management Systems in Petro-leum Products,Liquid Fuels,and Lubricants TestingLaboratories3.Summary of Test Method3.
11、1 The sample is placed in the X-ray beam,and theintensity of the sulfur K line at 5.373 is measured.Theintensity of a corrected background,measured at a recom-mended wavelength of 5.190,or if a rhodium tube is used,5.437,is subtracted from this intensity.The resultant netcounting rate is then compar
12、ed to a previously preparedcalibration curve or equation to obtain the concentration ofsulfur in mg/kg.(WarningExposure to excessive quantitiesof X radiation is injurious to health.Therefore,it is imperativethat the operator avoid exposing any part of his or her person,not only to primary X-rays,but
13、 also to secondary or scatteredradiation that might be present.The X-ray spectrometer should1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.03 on Elemental Analysis.Current edition
14、approved May 1,2017.Published July 2017.Originally approvedin 1998.Last previous edition approved in 2012 as D6334 12.DOI:10.1520/D6334-12R17E01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volu
15、me 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardiza
16、tion 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 be operated in accordance with the regulations of recommen-dations governing the use of ionizing radiation.)4.Significance and Use4.1 Knowledge of the presence of sulfur in petroleumproducts,especiallyfuels,helpspredictperformancecharacteristics,potential corrosion problems,and vehicle emis-sion
