【英文标准名称】:StandardTestMethodforDeterminationof2,4-TolueneDiisocyanate(2,4-TDI)and2,6-TolueneDiisocyanate(2,6-TDI)inWorkplaceAtmospheres(1-2PPMethod)
【原文标准名称】:测定工作场所大气中2,4-二异氰酸甲苯(2,4-TDI)和2,6-二异氰酸甲苯(2,6-TDI)的标准试验方法
【标准号】:ASTMD5836-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D22.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:2,4-toluenediisocyanate;2,6-toluenediisocyanate;1-(2-Pyridyl)piperazine;2,4-TDI;2,6-TDI;airmonitoring;high-performanceliquidchromatography;samplingandanalysis;workplaceatmospheres;Airmonitoring;HPLC(highperformanceliquidchroma
【摘要】:Diisocyanatesareusedintheproductionofpolyurethanefoams,plastics,elastomers,surfacecoatings,andadhesives(5,6).IthasbeenestimatedthattheproductionofTDIwillsteadilyincreaseduringthefutureyears.Diisocyanatesareirritantstoeyes,skin,andmucousmembraneandarerespiratorysensitizers.Chronicexposuretolowconcentrationsofdiisocyanatesproducesanallergicsensitizationwhichmayprogressintoasthmaticbronchitis(7,8).TheOccupationalSafetyandHealthAdministration(OSHA)hasapermissibleexposurelimit(PEL)for2,4-TDIof0.02ppmor0.14mg/m3asaceilinglimit.ThereisnoOSHAPELfor2,6x2013;TDI(9).TheAmericanConferenceofGovernmentalIndustrialHygienists(ACGIH)hasatimex2013;weightedaverage(TWA)ThresholdLimitValue(TLV)of0.005ppmor0.036mg/m3andashort-termexposurelimit(STEL)of0.02ppmor0.14mg/m3foreither2,4x2013;TDI,or2,6x2013;TDI,orforamixtureof2,4x2013;and2,6x2013;TDI(10).Thisproposedtestmethodhasbeenfoundsatisfactoryformeasuring2,4and2,6-TDIlevelsintheworkplace.1.1Thistestmethoddescribesthedeterminationof2,4-toluenediisocyanate(2,4-TDI)and2,6-toluenediisocyanate(2,6-TDI)inairsamplescollectedfromworkplaceatmospheresinacassettecontainingaglass-fiberfilterimpregnatedwith1-(2-pyridyl)piperazine(1-2PP).Thisprocedureisveryeffectivefordeterminingthevaporcontentofatmospheres.AtmospherescontainingaerosolscauseTDIresultstobeunderestimated.1.2Thistestmethodusesahigh-performanceliquidchromatograph(HPLC)equippedwithafluorescenceoranultraviolet(UV)detector(1-4).,1.3Thevalidatedrangeofthetestmethod,aswritten,isfrom1.4to5.6x03BC;gof2,4-TDIand2,6-TDIwhichisequivalenttoapproximately9.8to39ppbfor2,4-TDIand2,6-TDIbasedona20-Lairsample.TheHPLCmethodusinganUVdetectoriscapableofdetecting0.078x03BC;gof2,4-TDIand0.068x03BC;gof2,6-TDIina4.0-mLsolventvolume,whichisequivalentto0.55ppbfor2,4-TDIand0.48ppbfor2,6-TDIbasedona20-Lairsample.1.4Theisomersof2,4-TDI,and2,6-TDI,canbeseparatedutilizingareversedphasecolumnfortheHPLCmethod.Becauseindustrialapplicationsemployanisomericmixtureof2,4-and2,6-TDI,theabilitytoachievethisseparationisimportant.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SeeSection9forspecificprecautions.
【中国标准分类号】:C70
【国际标准分类号】:
【页数】:5P.;A4
【正文语种】:英语