1、Designation:D672811Standard Test Method forDetermination of Contaminants in Gas Turbine and DieselEngine Fuel by Rotating Disc Electrode Atomic EmissionSpectrometry1This standard is issued under the fixed designation D6728;the number immediately following the designation indicates the year oforigina
2、l 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.Scope*1.1 This test method covers the determination of contami-nants and materials
3、 as a result of corrosion in gas turbine ordiesel engine fuels by rotating disc electrode atomic emissionspectroscopy(RDE-AES).1.1.1 The test method is applicable to ASTM Grades 0-GT,1-GT,2-GT,3-GT,and 4-GT gas turbine fuels and Grades LowSulfur No.1-D,Low Sulfur No.2-D,No.1-D,No.2-D,andNo.4-D diese
4、l fuel oils.1.1.2 This test method provides a rapid at-site determinationof contamination and corrosive elements ranging from frac-tions of mg/kg to hundreds of mg/kg in gas turbine and dieselengine fuels so the fuel quality and level of required treatmentcan be determined.1.1.3 This test method use
5、s oil-soluble metals for calibra-tion and does not purport to quantitatively determine or detectinsoluble particles.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.The preferred units are mg/kg(ppm by mass).1.3 This standard
6、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.2.Referenced Documents2.1 ASTM Stand
7、ards:2D975 Specification for Diesel Fuel OilsD2880 Specification for Gas Turbine Fuel OilsD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD5854 Practice for Mixing and Handling of Liquid Samplesof Petroleum and Petroleum ProductsD6299 Practice for Applying Statistical Quality As
8、suranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System Performance3.Terminology3.1 Definitions:3.1.1 burn,vtin emission spectroscopy,to vaporize andexcite a specimen with sufficient energy to generate spectralradiation.3.1.2 calibration,nthe determination of the values of th
9、esignificant parameters by comparison with values indicated bya set of reference standards.3.1.3 calibration curve,nthe graphical or mathematicalrepresentation of a relationship between the assigned(known)values of standards and the measured responses from themeasurement system.3.1.4 calibration sta
10、ndard,na standard having an ac-cepted value(reference value)for use in calibrating a measure-ment instrument or system.3.1.5 detection limit,nthe smallest concentration of anelement that can be measured for specific analysis conditionsand data collection periods.3.1.6 emission spectroscopy,nmeasurem
11、ent of energyspectrum emitted by or from an object under some form ofenergetic stimulation;for example,light,electrical discharge,and so forth.3.2 Definitions of Terms Specific to This Standard:3.2.1 arc discharge,na self-sustaining,high currentdensity,high temperature discharge uniquely characteriz
12、ed bya cathode fall nearly equal to the ionization potential of the gasor vapor in which it exists.3.2.2 check sample,na reference material usually pre-pared by a single laboratory for its own use as a measurementcontrol standard,or for the qualification of a measurementmethod.1This test method is u
13、nder 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 approved Oct.1,2011.Published November 2011.Originallyapproved in 2001.Last previous edition approved in 2006 as D
14、672801(2006).DOI:10.1520/D6728-11.2For 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.*A Summary of Changes section ap
15、pears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.3 contaminant,nmaterial in a fuel sample that maycause ash deposition or high temperature corrosion.3.2.4 graphite disc electrode,na soft form of the ele
16、mentcarbon manufactured into the shape of a disc for use as anelectrode in arc/spark spectrometers for oil and fuel analysis.3.2.5 graphite rod electrode,na soft form of the elementcarbon manufactured into the shape of a rod for use as acounter electrode in arc/spark spectrometers for oil and fuelanalysis.3.2.6 profiling,nto set the actual position of the entranceslit to produce optimum measurement intensity.3.2.7 standardization,nthe process of reestablishing andcorrecting a calibration curve t
