ASTM_D_7875_-_14.pdf

Designation:D787514Standard Test Method forDetermination of Butanol and Acetone Content of Butanolfor Blending with Gasoline by Gas Chromatography1This standard is issued under the fixed designation D7875;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.Scope1.1 This test method covers the determination of the butanolcontent of butanol for blending with gasoline by gas chroma-tography.1.2 Butanol is determined from 95%to 99.9%by mass,acetone is determined from 0.02%to 1.5%by mass,ethanolis determined from 0.02%to 1.5%by mass,and methanol isdetermined from 0.02%to 1.5%by mass.Equations used toconvert these individual components from mass percent tovolume percent are provided.1.3 This test method identifies and quantifies acetone,ethanol,and methanol,but does not purport to identify allindividual components that may be present in butanol forgasoline blending.1.4 Water cannot be determined by this test method andshall be measured by a procedure such as Test Method D1364and the result used to correct the chromatographic values.1.5 This test method is inappropriate for impurities that boilat temperatures higher than 225 C or for impurities that causepoor or no response in a flame ionization detector,such aswater.1.6 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 MethodD1364 Test Method for Water in Volatile Solvents(KarlFischer Reagent Titration Method)D4052 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 StandardsD4626 Practice for Calculation of Gas ChromatographicResponse FactorsD4806 Specification for Denatured Fuel Ethanol for Blend-ing with Gasolines for Use as Automotive Spark-IgnitionEngine FuelD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD6300 Practice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Products andLubricantsD7862 Specification for Butanol for Blending with Gasolinefor Use as Automotive Spark-Ignition Engine FuelE355 Practice for Gas Chromatography Terms and Relation-shipsE594 Practice for Testing Flame Ionization Detectors Usedin Gas or Supercritical Fluid ChromatographyE1064 Test Method for Water in Organic Liquids by Coulo-metric Karl Fischer Titration3.Terminology3.1 DefinitionsThis test method makes reference to manycommon gas chromatographic procedures,terms,and relation-ships.Detailed definitions can be found in Practices E355 andE594.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.04.0L on Gas Chromatography Methods.Current edition approved July 1,2014.Published September 2014.DOI:10.1520/D7875-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.1 butanol,nfor the purposes of this method,butanol orbutyl alcohol refers to one of three structural isomers ofbutanol1-butanol,2-butanol,and 2-methyl-1-propanol.Thistest method has not been evaluated for use with the butanolisomer 2-methyl-2-propanol.4.Summary of Test Method4.1 A representative aliquot of the butanol sample is intro-duced into a gas chromatograph equipped with a polydimeth-ylsiloxane bonded phase capillary column.Helium carrier gastransports the vaporized aliquot through the column where thecomponents are separated by the chromatographic process.Components are sensed by a flame ionization detector as theyelute from the column.The detector signal is processed by anelectronic data acquisition system.The butanol,acetone,ethanol,and methanol components are identified by comparingtheir retention times to the ones identified by analyzingstandards under identical conditions.The concentrations of allcomponents are determined in mass percent area by normal-ization o