1、Designation:D544121Standard Test Method forAnalysis of Methyl Tert-Butyl Ether(MTBE)by GasChromatography1This standard is issued under the fixed designation D5441;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revis
2、ion.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 the purityof methyl tert-butyl ether(MTBE)by gas chromatography.Italso provides a proce
3、dure to measure impurities in MTBE suchas C4to C12olefins,methyl,isopropyl and tert-butyl alcohols,methyl sec-butyl and methyl tert-amyl ethers,acetone,andmethyl ethyl ketone.Impurities are determined to a minimumconcentration of 0.02%by mass.1.2 This test method is not applicable to the determinati
4、onof MTBE in gasoline.1.3 Water cannot be determined by this test method andmust be measured by a procedure such as Test Method D1364and the result used to normalize the chromatographic values.1.4 Amajority of the impurities in MTBE is resolved by thetest method,however,some co-elution is encountere
5、d.1.5 This test method is inappropriate for impurities that boilat temperatures higher than 180 C or for impurities that causepoor or no response in a flame ionization detector,such aswater.1.6 The values stated in SI(metric)units of measurementare preferred and used throughout the standard.1.6.1 Ex
6、ceptionAlternate units,in common usage,arealso provided to improve clarity and aid the user of this testmethod.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,
7、health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of Inter
8、national Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1364 Test Method for Water in Volatile Solvents(KarlFischer Reagent Titration Method)(Withdrawn 2021)3D3700 Practice for Obtaining
9、 LPG Samples Using a Float-ing Piston CylinderD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4175 Terminology Relating to Petroleum Products,LiquidFuels,and LubricantsD4307 Practice for Preparation of Liquid Blends for Use asAnalytical StandardsD4626 Practice for Calculation o
10、f Gas ChromatographicResponse FactorsE355 Practice for Gas Chromatography Terms and Relation-shipsE594 Practice for Testing Flame Ionization Detectors Usedin Gas or Supercritical Fluid Chromatography3.Terminology3.1 DefinitionsThis test method makes reference to manycommon gas chromatographic proced
11、ures,terms,and relation-ships.Detailed definitions of these and other terms used in thistest method can be found in Practices E355 and E594,andTerminology D4175.3.2 Definitions of Terms Specific to This Standard:3.2.1 C4to C12olefins,ncommon olefin impurities inMTBE are unreacted feedstock and dimer
12、s or trimers of feedsuch as trimethylpentene or pentamethylheptene.4.Summary of Test Method4.1 A representative aliquot of the MTBE product sample isintroduced into a gas chromatograph equipped with a methyl1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid
13、 Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.04.0L on Gas Chromatography Methods.Current edition approved Dec.1,2021.Published December 2021.Originallyapproved in 1993.Last previous edition approved in 2017 as D5441 98(2017).DOI:10.1520/D5441-21.2For referenced ASTM stan
14、dards,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.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summ
15、ary 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 t
16、he Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1?silicone bonded phase fused silica open tubular column.Helium carrier gas transports the vaporized aliquot through thecolumn where the components are separated by the chromato-graphic process.Components are sensed by a flame ionizationdetector as they elute from the column.4.2 The detector signal is processed by an e
