International Standard
ISO 17734-1:2013
Determination of organonitrogen compounds in air using liquid chromatography and mass spectrometry — Part 1: Isocyanates using dibutylamine derivatives
Reference number
ISO 17734-1:2013
Edición 2
2013-12
International Standard
Vista previa
ISO 17734-1:2013
58006
No disponible en español
Publicado (Edición 2, 2013)
Esta norma se revisó y confirmó por última vez en 2019. Por lo tanto, esta versión es la actual.

ISO 17734-1:2013

ISO 17734-1:2013
58006
Idioma
Formato
CHF 151
Convertir Franco suizo (CHF) a tu moneda

Resumen

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.

Informaciones generales

  •  : Publicado
     : 2013-12
    : Norma Internacional para revisar [90.92]
  •  : 2
     : 33
  • ISO/TC 146/SC 2
    13.040.30 
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