收藏 分享(赏)

ASTM_D_7754_-_19.pdf

上传人:益****师 文档编号:172433 上传时间:2023-03-04 格式:PDF 页数:19 大小:628.30KB
下载 相关 举报
ASTM_D_7754_-_19.pdf_第1页
第1页 / 共19页
ASTM_D_7754_-_19.pdf_第2页
第2页 / 共19页
ASTM_D_7754_-_19.pdf_第3页
第3页 / 共19页
ASTM_D_7754_-_19.pdf_第4页
第4页 / 共19页
ASTM_D_7754_-_19.pdf_第5页
第5页 / 共19页
ASTM_D_7754_-_19.pdf_第6页
第6页 / 共19页
亲,该文档总共19页,到这儿已超出免费预览范围,如果喜欢就下载吧!
资源描述

1、Designation:D775419Standard Test Method forDetermination of Trace Oxygenates in Automotive Spark-Ignition Engine Fuel by Multidimensional GasChromatography1This standard is issued under the fixed designation D7754;the number immediately following the designation indicates the year oforiginal adoptio

2、n 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 traceoxygenates in automotive spark-

3、ignition engine fuel.Themethod used is a multidimensional gas chromatographicmethod using 1,2-dimethoxy ethane as the internal standard.The oxygenates that are analyzed are:methyl-tertiary butylether(MTBE),ethyl-tertiary butyl ether(ETBE),diisopropylether(DIPE),methanol,tertiary-amyl methyl ether(TA

4、ME),n-propanol,i-propanol,n-butanol,i-butanol,tert-butyl alcohol,sec-butyl alcohol,and tert-pentanol.Ethanol is usually notmeasured as a trace oxygenate since ethanol can be used as themain oxygenate compound in finished automotive spark-ignition fuels such as reformulated automotive spark-ignitionf

5、uels.The concentration range of the oxygenates covered in theILS study was from 10 mg kg to 2000 mg kg.In addition thismethod is also suitable for the measurement of the C5 isomericalcohols(2-methyl-1-butanol,2-methyl-2-butanol)presentfrom the fermentation of ethanol.1.2 The ethanol blending concent

6、ration for which this testmethod applies ranges from 1%to 15%by volume.Higherconcentrations of ethanol coelute with methanol in the analyti-cal column.Lower levels of ethanol,similar to the otheroxygenate,can be calibrated and analyzed also.If higherethanol concentrations are expected,the window cut

7、ting tech-nique can be used to avoid ethanol from entering the analyticalcolumn and interfere with the determination of the otheroxygenates of interest.Refer to Appendix X1 for details.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thiss

8、tandard.1.3.1 Alternative units,in common usage,are also providedto increase clarity and aid the users of this test method.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-pr

9、iate 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 theDevelopm

10、ent 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 for Manual Sampling of Petroleum andPetroleum ProductsD4307 Practice for Preparation of Liquid Blends fo

11、r Use asAnalytical StandardsD4815 Test Method for Determination of MTBE,ETBE,TAME,DIPE,tertiary-Amyl Alcohol and C1to C4Alco-hols in Gasoline by Gas ChromatographyD6304 Test Method for Determination of Water in Petro-leum Products,Lubricating Oils,and Additives by Cou-lometric Karl Fischer Titration

12、3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 electronic pressure control,nelectronic pneumaticcontrol of carrier gas flows.Can be flow or pressure pro-grammed to speed up elution of components.3.1.2 flame ionization detector(FID),ndetector used toanalyze the components eluti

13、ng from the column.3.1.3 fluidic switch,ndevice that reverses the directionalflow in a union T altering the pressure at the midpoint.In itssimplest design it is also known as a Dean Switch.3.1.4 inlet,ncapillary split/splitless inlet system operatedin the split mode is recommended.Operate the inlet

14、within itslinear range.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 Nov.1,2019.Published December 2019.Originallyappr

15、oved in 2011.Last previous edition approved in 2016 as D7754 16.DOI:10.1520/D7754-19.2For 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

16、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 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)Comm

展开阅读全文
相关资源
猜你喜欢
相关搜索

当前位置:首页 > 专业资料 > 国外标准

copyright@ 2008-2023 wnwk.com网站版权所有

经营许可证编号:浙ICP备2024059924号-2