1、Designation:D751519Standard Test Method forPurity of 1,3-Propanediol(Gas Chromatographic Method)1This standard is issued under the fixed designation D7515;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A nu
2、mber 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 describes the gas chromatographicdetermination of purity for 1,3-propanediol(PDO).This testmethod was originally developed t
3、o determine the purity of1,3-propanediol used for the application as the freeze pointdepressant base fluid in formulated PDO engine coolants.Useof the method for purity of PDO for other applications may beviable.1.2 The values stated in SI units are to be regarded asstandard.No other units of measur
4、ement are included in thisstandard.1.2.1 ExceptionInch-pound units(psi)are used in Table 1,Pressure Program,Options A and B.1.3 Review the current Material Safety Data Sheets(MSDS)for detailed information concerning toxicity,first aidprocedures,and safety precautions.1.4 This standard does not purpo
5、rt 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was
6、developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Doc
7、uments2.1 ASTM Standards:2D1123 Test Methods for Water in Engine Coolant Concen-trate by the Karl Fischer Reagent MethodE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE300 Practice for Sampling Industrial ChemicalsE691 Practice for Conducting an Interlaboratory Study toDete
8、rmine the Precision of a Test MethodE2409 Test Method for Glycol Impurities in Mono-,Di-,Tri-and Tetraethylene Glycol and in Mono-and DipropyleneGlycol(Gas Chromatographic Method)3.Summary of Test Method3.1 The sample is analyzed by a temperature-programmedgas chromatograph,equipped with a capillary
9、 column andflame ionization detector(FID),and quantification is per-formed by direct area normalization.3.2 Additionally,the use of a reference sample usingEthylene,Propylene,or Dipropylene Glycol(EG,PG or DPG)in 1,3-PDO(minimum purity 99.5%)should be used as aperformance check(see Section 8).NOTE1T
10、he application of this reference sample is also used todemonstrate the separation of commonly used glycols(EG,PG and DPG)in engine coolants,from PDO.Solutions of EG,PG,or DPG inconcentrations of 0.1 to not more than 1%may be used.4.Significance and Use4.1 Knowledge of an approved method is required
11、toestablish whether the product meets the requirements of itsspecifications.The use of glycols in the reference sample is notintended to suggest the presence of glycol(EG,PG and DPG)impurities,but to demonstrate and quantify the separation ofcommonly used Engine Coolant glycols from PDO.5.Apparatus5
12、.1 Gas Chromatograph(s)provided with a sample splitteror on-column injection,flame ionization detector andtemperature-programming facilities.The instrument must besuitable for analysis according to the operating instructionsgiven in Table 1.To account for differences among laboratoryequipment,the tw
13、o most common column choices are listed.1This test method is under the jurisdiction of ASTM Committee D15 on EngineCoolants and Related Fluids and is the direct responsibility of SubcommitteeD15.07 on Specifications.Current edition approved Oct.1,2019.Published November 2019.Originallyapproved in 20
14、09.Last previous edition approved in 2014 as D751509(2014).DOI:10.1520/D751519.2For 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
15、ASTM website.Copyright ASTM International,100 Barr 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
16、of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 NOTE2Other column suppliers market alternative stationary phases,therefore,it is permissible to use a different column from an alternativesupplier.However,the chromatogram obtained must be identical,withregard to separation of PDO and other glycol components,to thoseillustrated in Fig.A1.1 and Fig.A1.2.5.1.1 ColumnsThe analytical column used must com-pletely se
