1、Designation:D477302(Reapproved 2012)Standard Test Method forPurity of Propylene Glycol Monomethyl Ether,DipropyleneGlycol Monomethyl Ether,and Propylene GlycolMonomethyl Ether Acetate1This standard is issued under the fixed designation D4773;the number immediately following the designation indicates
2、 the year oforiginal adoption 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 by gaschrom
3、atography of propylene glycol monomethyl ether(PM),dipropylene glycol monomethyl ether(DPM),and propyleneglycol monomethyl ether acetate(PMA).NOTE1Propylene glycol monomethyl ether(PM)is a mixture of twoisomers:1-methoxy-2-propanol and 2-methoxy-1-propanol.Dipropylene glycol monomethyl ether(DPM)is
4、a mixture of fourisomers:1-(2-methoxy-1-methylethoxy)-2-propanol is one of the majorisomers.Propylene glycol monomethyl ether acetate(PMA)is a mixture of twoisomers:1-methoxy-2-acetoxypropane and 2-methoxy-1-acetoxypropane.1.1.1 This test method covers the determination of PM inthe range from 98 to
5、100%,and DPM in the range from 0.08to 0.6%.1.1.2 This test method covers the determination of DPM inthe range from 98 to 100%,PM in the range from 0.05 to0.3%,and tripropylene glycol monomethyl ether(TPM)in therange from 0.06 to 0.3%.1.1.3 This test method covers the determination of PMA inthe range
6、 from 99 to 100%,and PM in the range from 0.03 to1.0%.1.2 Water and acid cannot be determined by this test methodand must be measured in accordance with Test Methods D1364and D1613,and the results used to normalize the chromato-graphic data.1.3 The following applies to all specified limits in thisst
7、andard;for purposes of determining conformance with thisstandard,an observed value or a calculated value shall berounded off“to the nearest unit”in the last right-hand digitused in expressing the specification limit,in accordance withthe rounding-off method of Practice E29.1.4 The values stated in S
8、I units are to be regarded asstandard.No other units of measurement are 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 therespons
9、ibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1364 Test Method for Water in Volatile Solvents(KarlFischer Reagent Titration Method)D1613 Tes
10、t Method for Acidity in Volatile Solvents andChemical Intermediates Used in Paint,Varnish,Lacquer,and Related ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3.Summary of Test Method3.1 A representative sample of PM,DPM,or PMA contain-ing the
11、 appropriate internal standard is injected into a capillarygas chromatograph and the components are detected with aflame ionization detector.Quantification is made by peak areameasurement using internal standardization and a computingintegrator.4.Significance and Use4.1 This test method is used to d
12、etermine the purity of PM,DPM,and PMAby subtracting calculated total impurities from100%.4.2 This test method is used to determine the quantity ofresidual glycol ether present in PMA.4.3 This test method is used for identifying various impu-rities in PM,DPM,and PMA.1This test method is under the jur
13、isdiction 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 in 1988.Last previous ed
14、ition approved in 2007 as D4773 02(2007).DOI:10.1520/D4773-02R12.2For 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.*
15、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.Apparatus5.1 ChromatographAny programmed temperature gaschromatograph designed or modified for use with capillarycolumns.The
16、 chromatograph must also be equipped with aflame ionization detector.5.2 ColumnCapillary,5 m thick film,10 m by 0.32 mminside diameter,fused silica coated,with 5%phenyl methylsilicon liquid phase.5.3 Syringe10 L or equivalent to introduce a representa-tive sample onto the column.5.4 Computing Integator,capable of peak summation and abaseline construction.5.5 Analytical Balance,capable of measuring 0.1 mg.6.Reagents and Materials6.1 Purity of ReagentsReagent grade chemicals shall beused in all te