ASTM_D_4815_-_15b.pdf

Designation:D481515bStandard Test Method forDetermination of MTBE,ETBE,TAME,DIPE,tertiary-AmylAlcohol and C1to C4Alcohols in Gasoline by GasChromatography1This standard is issued under the fixed designation D4815;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers the determination of ethers andalcohols in gasolines by gas chromatography.Specific com-pounds determined are methyl tert-butylether(MTBE),ethyltert-butylether(ETBE),tert-amylmethylether(TAME),diiso-propylether(DIPE),methanol,ethanol,isopropanol,n-propanol,isobutanol,tert-butanol,sec-butanol,n-butanol,and tert-pentanol(tert-amylalcohol).1.2 Individual ethers are determined from 0.20 mass%to20.0 mass%.Individual alcohols are determined from0.20 mass%to 12.0 mass%.Equations used to convert tomass%oxygen and to volume%of individual compounds areprovided.At concentrations 10 volume%olefins,the interference may be 0.20 mass%.Annex A1 gives achromatogram showing the interference observed with a gaso-line containing 10 volume%olefins.1.3 This test method includes a relative bias correlation forethanol in spark-ignition engine fuels for the U.S.EPAregulations reporting based on Practice D6708 accuracy assess-ment between Test Method D4815 and Test Method D5599 asa possible Test Method D4815 alternative to Test MethodD5599.The Practice D6708 derived correlation equation isonly applicable for ethanol in fuels in the concentration rangefrom 2.28%to 14.42%by mass as measured by Test MethodD4815.The applicable Test Method D5599 range for ethanol isfrom 2.16%to14.39%by mass as reported by Test MethodD5599.1.4 Alcohol-based fuels,such as M-85 and E-85,MTBEproduct,ethanol product,and denatured alcohol,are specifi-cally excluded from this test method.The methanol content ofM-85 fuel is considered beyond the operating range of thesystem.1.5 Benzene,while detected,cannot be quantified using thistest method and must be analyzed by alternate methodology(see Test Method D3606).1.6 The values stated in SI units are to be regarded asstandard.Alternate units,in common usage,are also providedto increase clarity and aid the users of this test method.1.7 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 and health practices and determine the applica-bility of regulatory limitations prior to use.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 MethodD1744 Test Method for Water in Liquid Petroleum Productsby Karl Fischer Reagent3D3606 Test Method for Determination of Benzene andToluene in Finished Motor and Aviation Gasoline by GasChromatographyD4052 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 Standards1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.04.0L on Gas Chromatography Methods.Current edition approved Dec.1,2015.Published December 2015.Originallyapproved in 1989.Last previous edition approved in 2015 as D4815 15a.DOI:10.1520/D4815-15B.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 appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 D4420 Test Method for Determination of Aromatics inFinished Gasoline by Gas Chromatography(Withdrawn2004)3D5599 Test Method for Determination of Oxygenates inGasoline by Gas Chromatography and Oxygen SelectiveFlame Ionization DetectionD6708 Practice for Statistical Assessment and Improvementof Expected Agreement Between Two Test Methods thatPurport to Measure the Same Property of a Material3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 low volume connectora special union for connectingtwo lengths of tubing 1.6 mm inside diameter and smaller.Sometimes this is referred to as zero dead volume union.3.1.2 oxygenateany oxygen-containing organic compoundthat can be used as a fuel or fuel supplement,for example,various alcohols and ethers.3.1.3 split ratioin capillary gas chromatography,the ratioof the total flow of carr