1、Designation:D500807(Reapproved 2012)Standard 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 th
2、e 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 ethylmethyl pentanol content and purity value
3、of 2-ethylhexanol.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 t
4、est method to relevantspecifications,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 o
5、f measurement are included in thisstandard.1.5 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
6、limitations prior to use.For a specifichazard statement,see 6.1.1.1.6 For hazard information and guidance,see the suppliersMaterial Safety Data Sheet.2.Referenced Documents2.1 ASTM Standards:2D1613 Test Method for Acidity in Volatile Solvents andChemical Intermediates Used in Paint,Varnish,Lacquer,a
7、nd 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-ethylhexanol is separ
8、ated 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 integration technique.Th
9、e 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 the results are us
10、ed 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 sum of the impuriti
11、es,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.5.Apparatus5.1 ChromatographAny gas chromatograph designed ormodified for use with capillary or wide-bore capillary columns.The gas chromatogr
12、aph 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 from ethyl methyl pentanol and
13、 other impuri-ties that may be present.The peaks should be resolvedquantitatively within a practical elapsed time.Columns thatmeet the requirement of this test method are listed in Table 1.Other columns may be used,provided the user establishes thata column gives the required separations.1This test
14、method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.35 on Solvents,Plasticizers,and Chemical Intermediates.Current edition approved July 1,2012.Published September 2012.Originallyapproved i
15、n 1989.Last previous edition approved in 2007 as D5008 07.DOI:10.1520/D5008-07R12.2For 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 ont
16、he 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 States1 5.3 Specimen Introduction SystemAny system capable ofintroducing a representative specimen into the gas chromato-graph may be used.A 1-L syringe has been used successfully.5.4 Computing IntegratorAny computing integrator ca-pable of accurately determining the peak areas generatedduring this analysis.5.5 Anal
