ASTM_D_5845_-_21.pdf

Designation:D584521Standard Test Method forDetermination of MTBE,ETBE,TAME,DIPE,Methanol,Ethanol and tert-Butanol in Gasoline by InfraredSpectroscopy1This standard is issued under the fixed designation D5845;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.Scope*1.1 This test method covers the determination of methanol,ethanol,tert-butanol,methyl tert-butyl ether(MTBE),ethyltert-butyl ether(ETBE),tert-amyl methyl ether(TAME),anddiisopropyl ether(DIPE)in gasoline by infrared spectroscopy.The test method is suitable for determining methanol from1.7%to 5.5%by mass,ethanol from 1.5%to 10%by mass,tert-butanol from 1.6%to 12%by mass,DIPE from 1.2%to17%by mass,MTBE from 2.0%to 16.4%by mass,ETBEfrom 2.0%to 18.5%by mass,and TAME from 1.5%to18.5%by mass.1.2 This test method is applicable to oxygenate(s)in gaso-line singularly or in multiple mixtures hereof according to theoxygenates and mass percent ranges given in 1.1.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international 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)Committee.2.Referenced Documents2.1 ASTM Standards:2D1298 Test Method for Density,Relative Density,or APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Hydrometer MethodD4052 Test Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4307 Practice for Preparation of Liquid Blends for Use asAnalytical StandardsD4815 Test Method for Determination of MTBE,ETBE,TAME,DIPE,tertiary-Amyl Alcohol and C1to C4Alco-hols in Gasoline by Gas ChromatographyD5599 Test Method for Determination of Oxygenates inGasoline by Gas Chromatography and Oxygen SelectiveFlame Ionization DetectionD8321 Practice for Development and Validation of Multi-variate Analyses for Use in Predicting Properties ofPetroleum Products,Liquid Fuels,and Lubricants basedon Spectroscopic MeasurementsNOTE1D5845 was developed with reference to E1655.A significantenhancement has been made to E1655 and is designated as D8321.D8321is the preferred standard Practice and describes the mathematics,that is,the regression algorithms to develop calibration equations that are alsodescribed in E1655.Replace E1655 with D8321.NOTE2Surrogate methods such as D5845 may indicate that theymake use of the creation of multivariate calibration equations describedtherein D8321,but they should not claim to follow the proceduresdescribed herein.2.2 Other Standard:3GC/OFID EPA Test MethodOxygen and Oxygenate Con-tent Analysis(by way of gas chromatography withoxygen-selective flame ionization detection)1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.04.0F on Absorption Spectroscopic Methods.Current edition approved Oct.1,2021.Published November 2021.Originallyapproved in 1995.Last previous edition approved in 2016 as D5845 01(2016).DOI:10.1520/D5845-21.2For 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.3Code of Federal Regulations,Part 80 of Title 40,Section 80.46(g);alsopublished in the Federal Register,Volume 59,No.32,February 16,1994,p 7828.*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 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 Technical Barriers to Trade(TBT)Committee.13.Terminology3.1 Definitions:3.1.1 diluent,na substance used to dilute something.3.1.1.1 DiscussionIn this standard,the diluents are termedbase gasoline A,B,and C,which are the diluents consisting ofgasoline blend stocks used to dissolve the oxygenates to createthe calibration and instrument q