1、Designation:D500822Standard Test Method forEthyl Methyl Pentanol Content and Purity Value of2-Ethylhexanol By Gas Chromatography1This standard is issued under the fixed designation D5008;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revisio
2、n,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 ethylmethyl pentanol content and purity value of 2-ethylhexanol.
3、1.2 Water and acid cannot be determined by this test methodand must be determined in accordance with Test MethodsD1613 and E203 and those results used to normalize thechromatographic data.1.3 For purposes of determining conformance of an ob-served or a calculated value using this test method to rele
4、vantspecifications,test result(s)shall be rounded off“to the nearestunit”in the last right-hand digit used in expressing thespecification limit,in accordance with the rounding-off methodof Practice E29.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are
5、included in thisstandard.1.5 For hazard information and guidance,see the suppliersMaterial Safety Data Sheet.1.6 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,he
6、alth,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.For a specific hazard statement,see 6.1.1.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision o
7、n Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1613 Test Method for Acidity in Volatile Solvents andChemical Intermediates Used in Paint,
8、Varnish,Lacquer,and Related ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE203 Test Method for Water Using Volumetric Karl FischerTitration3.Summary of Test Method3.1 A representative specimen is introduced onto a capillarycolumn.The 2-ethy
9、lhexanol is separated from the ethyl methylpentanol and other impurities while the components are trans-ported through the column by an inert carrier gas.Theseparated components are measured in the effluent by a flameionization detector and the areas for the peaks are determinedby a suitable integra
10、tion technique.The data are interpreted byapplying component detector response factors to the peakareas,and the relative concentrations are determined by relat-ing the individual peak responses to the total peak response.Acidity and water are measured by Test Methods D1613 andE203,respectively,and t
11、he results are used to normalize thevalues obtained by gas chromatography.An internal standardprocedure is also included as an alternative calculation tech-nique.With this procedure,all impurities are determinedrelative to the internal standard and the purity value isdetermined by subtracting the su
12、m of the impurities,water,andacid from 100.4.Significance and Use4.1 This test method is used to determine the purity valueand ethyl methyl pentanol content of 2-ethylhexanol.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and
13、 is the direct responsibility ofSubcommittee D01.35 on Solvents,Plasticizers,and Chemical Intermediates.Current edition approved Jan.1,2022.Published January 2022.Originallyapproved in 1989.Last previous edition approved in 2012 as D5008 07(2012)which was withdrawn January 2021 and reinstated in Jan
14、uary 2022.DOI:10.1520/D5008-22.2For 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 Ba
15、rr 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 Recommenda
16、tions issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.15.Apparatus5.1 ChromatographAny gas chromatograph designed ormodified for use with capillary or wide-bore capillary columns.The gas chromatograph should be equipped with a flameionization detector or other detector capable of operating withthese columns and capable of detecting impurities at a level of0.01 weight%with a signal to noise ratio of at least 5:1.5.2 ColumnAnycolumncapableofresolving2-ethylhexanol
