1、Designation:D721420Standard Test Method forDetermination of the Oxidation of Used Lubricants by FT-IRUsing Peak Area Increase Calculation1This standard is issued under the fixed designation D7214;the number immediately following the designation indicates the year oforiginal adoption or,in the case o
2、f 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.INTRODUCTIONThis test method was jointly developed with“Groupement Francais de Coordination”(GFC),technical com
3、mittee LM5 and“Coordinating European Council”(CEC)Surveillance Group T-048 forthe purpose of monitoring the oxidation stability of artificially aged automotive transmission fluids.This test method has been used in the CEC L-48-A-00 method as an end of test measurementparameter.1.Scope*1.1 This test
4、method covers the determination of the oxida-tion of used lubricants by FT-IR(Fourier Transform InfraredSpectroscopy).It measures the concentration change of con-stituents containing a carbonyl function that have formedduring the oxidation of the lubricant.1.2 This test method may be used to indicat
5、e relativechanges that occur in an oil under oxidizing conditions.Thetest method is not intended to measure an absolute oxidationproperty that can be used to predict performance of an oil inservice.1.3 This test method was developed for transmission oilswhich have been degraded either in service,or
6、in a laboratorytest,for example a bulk oxidation test.It may be used for otherin-service oils,but the stated precision may not apply.1.4 The results of this test method may be affected by thepresence of other components with an absorbance band in thezone of 1600 cm-1to 1800 cm-1.Low PAI values may b
7、edifficult to determine in those cases.Section 6 describes thesepossible interferences in more detail.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
8、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.1.7 This international standard was developed in accor-dance with international
9、ly 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:2D4057 Practice fo
10、r Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD7418 Practice for Set-Up and Opera
11、tion of Fourier Trans-form Infrared(FT-IR)Spectrometers for In-Service OilCondition MonitoringE131 Terminology Relating to Molecular Spectroscopy2.2 CEC Standard:CEC L-48-A-00 Oxidation Stability of Lubricating OilsUsed in Automotive Transmissions by Artificial Aging31This test method is under the j
12、urisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.96.03 on FTIR Testing Practices and Techniques Related toIn-Service Lubricants.Current edition approved June 1,2020.Published June 2020.Originallyapproved in 2006.La
13、st previous edition approved in 2019 as D721407a(2019).DOI:10.1520/D7214-20.2For 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 AST
14、M website.3Available from Coordinating European Council(CEC),c/o Interlynk Admin-istrative Services,Ltd.,P.O.Box 6475,Earl Shilton,Leicester,LE9 9ZB,U.K.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,P
15、A 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 Te
16、chnical Barriers to Trade(TBT)Committee.3.Terminology3.1 DefinitionsFor terminology relating to molecularspectroscopic methods,refer to Terminology E131.3.2 Definitions of Terms Specific to This Standard:3.2.1 carbonyl region,nregion of the FT-IR spectrumcorresponding to the absorbance of compounds containing acarbonyl function.Depending on the nature of the carbonylcompounds,this region is usually located between approxi-mately 1820 cm-1and 1650 cm-1.3.2.2 differential spectrum,nFT-IR absorbanc