1、Designation:D656212Standard Test Method forDetermination of Gaseous Hexamethylene Diisocyanate(HDI)in Air with 9-(N-methylaminomethyl)AnthraceneMethod(MAMA)in the Workplace1This standard is issued under the fixed designation D6562;the number immediately following the designation indicates the year o
2、foriginal 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 covers the determination of gaseoushexamethylene
3、 diisocyanate(HDI)in air samples collectedfrom workplace and ambient atmospheres.The method de-scribed in this test method collects separate fractions.Onefraction will be dominated by vapor,and the other fraction willbe dominated by aerosol.It is not known at the present timewhether this represents
4、a perfect separation of vapor andaerosol,and in any case,there are not separate exposurestandards for vapor and aerosol.Therefore,in comparing theresults for isocyanate against a standard,results from the twofractions should be combined to give a single total value.Thereason for splitting the sample
5、 into two fractions is to increaseanalytic sensitivity for the vapor fraction and also to give thehygienist or ventilation engineer some information concerningthe likely state of the isocyanate species.The analyses of thetwo fractions are different,and are provided in separate,linked,standards to av
6、oid confusion.This test method is principallyused to determine short term exposure(15 min)of HDI inworkplace environments for personal monitoring or in ambientair.The analysis of the aerosol fraction is performed separately,as described in Test Method D6561.1.2 Differential air sampling is performed
7、 with a segregat-ing device.2The vapor fraction is collected on a glass fiberfilter(GFF)impregnated with 9-(N-methylaminomethyl)an-thracene(MAMA).1.3 The analysis of the gaseous fraction is performed with ahigh performance liquid chromatograph(HPLC)equippedwith ultraviolet(UV)and fluorescence detect
8、ors.1.4 The range of application of this test method,using UVand fluorescence detectors both connected in serial,has beenvalidated from 0.006 to 1.12 g of monomeric HDI/2.0 mL ofdesorption solution,which corresponds to concentrationsequivalent to 0.0004 to 0.075 mg/m3of HDI based on a 15-Lair sample
9、.Those concentrations correspond to a range ofvapor phase concentrations from 0.06 ppb(V)to 11 ppb(V)andcover the established threshold limit value(TLV)value of 5ppb(V).1.5 The quantification limit for the monomeric HDI,usingthe UV detection,has been established as 0.012 g/2 mL ofdesorption solution
10、 and as 0.008 g/2 mL,using the fluores-cence detector.These limits correspond to 0.0008 mg/m3and0.0005 mg/m3respectively for an air sampled volume of 15 L.These values are equal to ten times the standard deviation(SD)obtained from ten measurements carried out on a standardsolution in contact with th
11、e GFF,whose concentration of 0.02g/2 mL is close to the expected detection limit.1.6 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 deter
12、mine the applica-bility of regulatory limitations prior to use.See Section 9 foradditional hazards.2.Referenced Documents2.1 ASTM Standards:3D1193 Specification for Reagent WaterD1356 Terminology Relating to Sampling and Analysis ofAtmospheresD1357 Practice for Planning the Sampling of the AmbientAt
13、mosphereD5337 Practice for Flow Rate Adjustment of Personal Sam-pling PumpsD6561 Test Method for Determination of Aerosol Mono-meric and Oligomeric Hexamethylene Diisocyanate(HDl)1This test method is under the jurisdiction of ASTM Committee D22 on AirQualityand is the direct responsibility of Subcom
14、mittee D22.04 on Workplace AirQuality.Current edition approved April 1,2012.Published May 2012.Originallyapproved in 2000.Last previous edition approved in 2011 as D6562-06(2011).DOI:10.1520/D6562-12.2The sampling device for isocyanates is covered by a patent held by JacquesLesage et al,IRSST,505 De
15、 Maisonneuve Blvd.West,Montreal,Quebec,Canada.If you are aware of an alternative to this patented item,please provide thisinformation to ASTM Headquarters.Your comments will receive careful consider-ation at a meeting of the responsible technical committee,1which you may attend.3For referenced ASTM
16、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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 in Air with(Methoxy-2phenyl-1)Piperazine(MOPIP)inthe Workplace2.2 Other Standard:Sampling Guide for Air Contaminants in the Workplace43.Terminology3.1 For definitions of terms u