Reference number
ISO 17734-1:2013
© ISO 2024
International Standard
ISO 17734-1:2013
Determination of organonitrogen compounds in air using liquid chromatography and mass spectrometry — Part 1: Isocyanates using dibutylamine derivatives
Edition 2
2013-12
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недоступно на русском языке
Опубликовано (Версия 2, 2013)
Последний раз этот публикация был пересмотрен в  2019. Поэтому данная версия остается актуальной.

ISO 17734-1:2013

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CHF 151
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Тезис

ISO 17734-1:2013 gives general guidance for the sampling and analysis of airborne isocyanates in workplace air. When amines and aminoisocyanates are suspected to be emitted (e.g. from thermal degradation of PUR), it is recommended that, in addition to isocyanates, the amines and aminoisocyanates in the air are determined, using DBA and ethyl chloroformate as reagents (see ISO 17734-2).

The method is suitable for the determination of a wide range of different isocyanates in both the gas and particle phases. Typical monofunctional isocyanates that can be determined are isocyanic acid (ICA), methyl isocyanate (MIC), ethyl isocyanate (EIC), propyl isocyanate (PIC), butyl isocyanate (BIC), and phenyl isocyanate (PhI). Typical monomeric diisocyanates include 1,6-hexamethylene diisocyanate (HDI), 2,4- and 2,6-toluene diisocyanate (TDI), 4,4'-methylenediphenyl diisocyanate (MDI), 1,5-naphthyl diisocyanate (NDI), isophorone diisocyanate (IPDI), and 4,4'-dicyclohexylmethane diisocyanate (HMDI). Multifunctional isocyanates that can be determined are typically oligomers in polymeric MDI, biuret-, isocyanurate-, and allophanate-adducts, and prepolymeric forms of isocyanates.

The instrumental detection limit for aliphatic isocyanates is about 5 nmol/sample and for aromatic isocyanates, it is about 0,2 nmol/sample. For a 15 l air sample, this corresponds to 0,6 ng∙m?3 for HDI and 0,02 ng∙m?3 for TDI.

The useful range, for a 5 l air sample, of the method is approximately 0,001 µg∙m?3 to 200 mg∙m?3 for TDI.

Общая информация

  • Текущий статус
     : Опубликовано
    Дата публикации
     : 2013-12
    Этап
    : Международный стандарт подлежит пересмотру [90.92]
  • Версия
     : 2
  • Технический комитет :
    ISO/TC 146/SC 2
    ICS :
    13.040.30 
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