收藏 分享(赏)

ASTM_D_5441_-_98_2013.pdf

上传人:益****师 文档编号:174820 上传时间:2023-03-04 格式:PDF 页数:7 大小:127.93KB
下载 相关 举报
ASTM_D_5441_-_98_2013.pdf_第1页
第1页 / 共7页
ASTM_D_5441_-_98_2013.pdf_第2页
第2页 / 共7页
ASTM_D_5441_-_98_2013.pdf_第3页
第3页 / 共7页
ASTM_D_5441_-_98_2013.pdf_第4页
第4页 / 共7页
ASTM_D_5441_-_98_2013.pdf_第5页
第5页 / 共7页
ASTM_D_5441_-_98_2013.pdf_第6页
第6页 / 共7页
亲,该文档总共7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:D544198(Reapproved 2013)Standard 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 y

2、ear 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 purityof methyl tert-butyl ether(MTBE)by gas chromatography.Italso

3、provides a procedure 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 mass%.1.2 This test method is not applicable to t

4、he determinationof 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

5、 is encountered.1.5 This test method is inappropriate for impurities that boilat temperatures higher than 180C 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 stan

6、dard.Alternate units,in common usage,are also provided to improve clarity and aidthe user 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 consult andestablish appropriat

7、e safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1364 Test Method for Water in Volatile Solvents(KarlFischer Reagent Titration Method)D3700 Practice for Obtaining LPG Samples Using a Float-ing Piston Cyli

8、nderD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4307 Practice for Preparation of Liquid Blends for Use asAnalytical StandardsD4626 Practice for Calculation of Gas ChromatographicResponse FactorsE355 Practice for Gas Chromatography Terms and Relation-shipsE594 Practice for T

9、esting Flame Ionization Detectors Usedin Gas or Supercritical Fluid Chromatography3.Terminology3.1 DefinitionsThis test method makes reference to manycommon gas chromatographic procedures,terms,and relation-ships.Detailed definitions of these can be found in PracticesE355 and E594.3.2 Definitions of

10、 Terms Specific to This Standard:3.2.1 C4to C12olefinscommon olefin impurities in MTBEare unreacted feedstock and dimers or trimers of feed such astrimethylpentene or pentamethylheptene.4.Summary of Test Method4.1 A representative aliquot of the MTBE product sample isintroduced into a gas chromatogr

11、aph equipped with a methylsilicone 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.

12、4.2 The detector signal is processed by an electronic dataacquisition system or integrating computer.Each eluting com-ponent is identified by comparing its retention time to thoseestablished by analyzing standards under identical conditions.4.3 The concentration of each component in mass percent isd

13、etermined by normalization of the peak areas after each peakarea has been corrected by a detector response multiplication1This 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

14、 Chromatography Methods.Current edition approved May 1,2013.Published August 2013.Originallyapproved in 1993.Last previous edition approved in 2008 as D544198(2008)1.DOI:10.1520/D5441-98R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at servicea

15、stm.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 factor.The detector response factors are determined by ana-lyzing

16、prepared standards with concentrations similar to thoseencountered in the sample.5.Significance and Use5.1 The presence of impurities in MTBE product can have adeleterious effect upon the value of MTBE as a gasolineadditive.Oxygenate and olefin contents are of primary con-cern.This test method provides a knowledge of the composi-tion of MTBE product.This is useful in the evaluation ofprocess operations control,in the valuation of the product,andfor regulatory purposes.5.2 Open tubular column gas

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