1、Designation:D638799(Reapproved 2014)1Standard Test Methods forComposition of Turpentine and Related Terpene Productsby Capillary Gas Chromatography1This standard is issued under the fixed designation D6387;the number immediately following the designation indicates the year oforiginal adoption or,in
2、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.1NOTENote 6 was corrected editorially in December 2014.1.Scope1.1 These test methods describe the det
3、ermination of theamounts of-pinene,-pinene,dipentene,terpene alcohols,and other terpene compounds in turpentine and related terpeneproducts using capillary gas chromatography.The two methodsfor determining the amount of the individual terpene com-pounds are the“internal standard”method,which yieldsa
4、bsolute values,and the“area percent”method,which yieldsrelative values.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It
5、is theresponsibility of the user of the standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE1Overall this test method gives excellent repeatability but onlymoderate reproducibility.This greater than normal differe
6、ntial is aconsequence of the variety of gas chromatography(GC)columns andother variables used by participants.These variables,coupled with thecomplex composition of the test products,enabled some workers toseparate peaks that others reported as one peak;thus,this test methodgives excellent precision
7、 within a given laboratory on a given GC.Whenlaboratory to laboratory comparison have to be made,however,it isessential that the GC operating conditions be defined closely.2.Referenced Documents2.1 ASTM Standards:2D13 Specification for Spirits of TurpentineD801 Test Methods for Sampling and Testing
8、DipenteneD802 Test Methods for Sampling and Testing Pine OilsD804 Terminology Relating to Pine Chemicals,IncludingTall Oil and Related ProductsD3009 Test Method for Compostition of Turpentine by GasChromatography(Withdrawn 1999)3E691 Practice for Conducting an Interlaboratory Study toDetermine the P
9、recision of a Test Method3.Terminology3.1 For definitions see Terminology D804.4.Summary of Test Method4.1 A weighed mixture of the sample and internal standardis prepared,and an aliquot is injected into a temperatureprogrammable capillary gas chromatograph to obtain thechromatogram.The peak areas f
10、or the compounds to bedetermined and also for the internal standard are measured.Thepercentages of the compounds present are calculated from thepeak area of the compounds/internal standard,weight ofinternalstandard/sample,andthecalibrationfactors.Alternately,the relative concentration of the compoun
11、ds maybe calculated using the area percent method.For hydrocarbons,the latter quantitation method usually is adequate to use sinceturpentine and related terpene products contain few nonelutingcompounds,and the individual response factors are of a similarvalue.A polar or nonpolar capillary column may
12、 be used forthe analysis,depending on the particular compounds requiringseparation and quantitation.NOTE2Response factors should be employed if significant quantitiesof polar and nonpolar compounds are present in the sample.5.Significance and Use5.1 Earlier methods for characterizing turpentine and
13、relatedterpene products were based on physical properties,such asthose in Specification D13 and Test Methods D801 and D802,and packed column gas chromatography for the major constitu-ents(for example,-pinene,-pinene)as in Test Method1These test methods are under the jurisdiction of ASTM Committee D0
14、1 onPaint and Related Coatings,Materials,and Applications and are the directresponsibility of Subcommittee D01.34 on Pine Chemicals and HydrocarbonResins.Current edition approved Dec.1,2014.Published January 2015.Originallyapproved in 1999.Last previous edition approved in 2010 as D6387 99(2010).DOI
15、:10.1520/D6387-99R14E01.2For 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.3The last approved version of this histori
16、cal standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 D3009.As terpene products became widely used as chemicalraw material,the separation and quantitation of compoundspresent at lower concentrations in the product became moreimportant.The capillary gas chromatographic technique de-scribed in these test methods is a rapid and convenient meansto perform these analyses.6.Apparatus6.1 Gas ChromatographA