1、Designation:D583620Standard Test Method forDetermination of 2,4-Toluene Diisocyanate(2,4-TDI)and 2,6-Toluene Diisocyanate(2,6-TDI)in Workplace Atmospheres(1-2 PP Method)1This standard is issued under the fixed designation D5836;the number immediately following the designation indicates the year ofor
2、iginal 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.Scope1.1 This test method describes the determination of 2,4-toluene diisocya
3、nate(2,4-TDI)and 2,6-toluene diisocyanate(2,6-TDI)in air samples collected from workplace atmo-spheres in a cassette containing a glass-fiber filter impregnatedwith 1-(2-pyridyl)piperazine(1-2 PP).This procedure is effec-tive for determining the vapor content of atmospheres.It isadvisable to perform
4、 a field extraction for atmospheres con-taining aerosols to avoid the possibility of an underestimation.1.2 This test method uses a high-performance liquid chro-matograph(HPLC)equipped with a fluorescence or an ultra-violet(UV)detector(1-4).2,3An ultra high performance liquidchromatograph(UPLC)can a
5、lso be used,provided that itsperformance is equivalent to what is stated in this standard.1.3 The validated range of the test method,as written,isfrom 1.4 to 5.6 g of 2,4-TDI and 2,6-TDI which is equivalentto approximately 9.8 to 39 ppb for 2,4-TDI and 2,6-TDI basedon a 20-L air sample.The HPLC meth
6、od using an UV detectoris capable of detecting 0.078 g of 2,4-TDI and 0.068 g of2,6-TDI in a 4.0-mL solvent volume,which is equivalent to0.55 ppb for 2,4-TDI and 0.48 ppb for 2,6-TDI based on a 20-Lair sample.1.4 The isomers of 2,4-TDI and 2,6-TDI can be separatedutilizing a reversed phase column fo
7、r the HPLC method.Because industrial applications employ an isomeric mixture of2,4-and 2,6-TDI,the ability to achieve this separation isimportant.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 This standard does not purp
8、ort 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.See Section 9 for specific precauti
9、ons.1.7 This international standard was 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
10、 to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:4D1193 Specification for Reagent WaterD1356 Terminology Relating to Sampling and Analysis ofAtmospheresD1357 Practice for Planning the Sampling of the AmbientAtmosphereD3686 Practice for Sampling Atmospheres to Collect Or-ganic Compoun
11、d Vapors(Activated Charcoal Tube Ad-sorption Method)D4840 Guide for Sample Chain-of-Custody ProceduresD5337 Practice for Flow Rate Adjustment of Personal Sam-pling PumpsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 Other Documents:ISO/IEC 17025 G
12、eneral requirements for the competence oftesting and calibration laboratories53.Terminology3.1 Definitions:1This test method is under the jurisdiction of ASTM Committee D22 on AirQuality and is the direct responsibility of Subcommittee D22.04 on Workplace AirQuality.Current edition approved March 1,
13、2020.Published May 2020.Originallyapproved in 1995.Last previous edition approved in 2013 as D5836 08(2013).DOI:10.1520/D5836-20.2Validation data and a preliminary draft of this test method were provided by theSalt Lake Technical Center of the U.S.Dept.of Labor,Occupational Safety andHealth Administ
14、ration,Salt Lake City,UT.3The boldface numbers in parentheses refer to a list of references at the end ofthis standard.4For 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 th
15、e standards Document Summary page onthe ASTM website.5Available from International Organization for Standardization(ISO),ISOCentral Secretariat,BIBC II,Chemin de Blandonnet 8,CP 401,1214 Vernier,Geneva,Switzerland,http:/www.iso.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West
16、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 Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.3.1.1 For definitions of terms used in this test method,referto Terminology D1356.4.Summary of Test Method4.1 A known volume of air is drawn throu
