1、Designation:D352414Standard Test Method forDiesel Fuel Diluent in Used Diesel Engine Oils by GasChromatography1This standard is issued under the fixed designation D3524;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、 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 use of gas chromatographyto determine the amount of diesel fuel in used engine lubricat-ing oil.Thi
3、s test is limited to SAE 30 oil.The diesel fueldiluent is analyzed at concentrations up to 12 mass%.NOTE1This test method may be applicable to higher viscosity gradeoils.However,such oils were not included in the program used to developthe precision statement.1.2 This test method is limited to gas c
4、hromatographsequipped with flame ionization detectors and temperatureprogrammable ovens.NOTE2The use of other detectors and instrumentation has beenreported.However,the precision statement applies only when the instru-mentation specified is employed.1.3 There is some overlap of the boiling ranges of
5、 dieselfuel and SAE 30 engine oils.Moreover,the boiling range ofSAE 30 oils from various sources can vary appreciably.As aresult,the calibration can be altered by as much as 2%,interms of fuel dilution.When testing unknown or mixed brandsof used engine oil,it should be realized that the precision of
6、 themethod may be poorer than the precision obtained whencalibrating with a new oil representative of the used oil beingtested.1.4 The values stated in SI units are to be regarded as thestandard.The values stated in inch-pound units are for infor-mation only.1.5 This standard does not purport to add
7、ress 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 requirements prior to use.2.Referenced Documents2.1 ASTM Standards:2D4626 Practice f
8、or Calculation of Gas ChromatographicResponse FactorsE260 Practice for Packed Column Gas ChromatographyE355 Practice for Gas Chromatography Terms and Relation-shipsE594 Practice for Testing Flame Ionization Detectors Usedin Gas or Supercritical Fluid ChromatographyE1510 Practice for Installing Fused
9、 Silica Open TubularCapillary Columns in Gas Chromatographs3.Terminology3.1 Definitions:3.1.1 For definition of gas chromatography terms,refer toPractice E355.3.2 Definitions of Terms Specific to This Standard:3.2.1 fuel dilution,nthe amount,expressed as apercentage,of diesel fuel found in engine lu
10、bricating oil.3.2.1.1 DiscussionFuel dilution may be the result ofengine wear or improper performance.3.2.2 fuel diluent,nin used oil analysis,is the unburnedfuel components that enter the engine crankcase causingdilution of the oil.3.2.2.1 DiscussionIn this method,the fuel diluent compo-nents being
11、 determined are from diesel fuel.3.3 Abbreviations:3.3.1 Acommon abbreviation of hydrocarbon compounds isto designate the number of carbon atoms in the compound.Aprefix is used to indicate the carbon chain form,while asubscripted suffix denotes the number of carbon atoms.For example:normal decane nC
12、10iso-tetradecane iC141This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricantsand is the direct responsibility ofSubcommittee D02.B0 on Automotive Lubricants.Current edition approved May 1,2014.Published May 2014.Originallyapproved in 1976.La
13、st previous edition approved in 2004 as D3524 04,whichwas withdrawn January 2013 and reinstated May 2014.DOI:10.1520/D3524-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refe
14、r to the standards Document Summary page onthe ASTM website.*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 States1 4.Summary of Test Method4.1 Gas chromatographic techniques are us
15、ed for analyzingthe samples,by adding a known percentage of n-decane as aninternal standard,in order to determine the mass percent ofdiesel fuel in the lubricating oil.A calibration curve ispreviously constructed which plots the diesel fuel to n-decaneresponse ratio versus the mass percent of diesel
16、 fuel inlubricating oil mixtures containing a constant amount ofinternal standard.The mass percent of diesel fuel in thesamples is determined by interpolation from the calibrationcurve.5.Significance and Use5.1 Some fuel dilution of the engine oil may take placeduring normal operation.However,excessive fuel dilution is ofconcern in terms of possible performance problems.Thismethod provides a means to determine the magnitude of thefuel dilution,providing the user with the ability to predictperfor
