BS ISO 17734-1:2013
Current
The latest, up-to-date edition.
Determination of organonitrogen compounds in air using liquid chromatography and mass spectrometry Isocyanates using dibutylamine derivatives
Hardcopy , PDF
English
31-12-2013
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Foreword
Introduction
1 Scope
2 Normative references
3 Principle
4 Reagents and materials
5 Preparation of standard solutions
6 Apparatus
7 Air sampling
8 Laboratory sample preparation
9 Instrumental settings
10 Data handling
11 Interferences
12 Determination of performance characteristics
Annex A (informative) - Performance characteristics
Annex B (informative) - Examples
Annex C (informative) - Commercially available products
Bibliography
Provides general guidance for the sampling and analysis of airborne isocyanates in workplace air.
| Committee |
EH/2/2
|
| DevelopmentNote |
Supersedes 04/30125607 DC. (04/2006) Supersedes 12/30256730 DC. (12/2013)
|
| DocumentType |
Standard
|
| Pages |
44
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This part of ISO17734 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 ISO17734-2).
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 5nmol/sample and for aromatic isocyanates, it is about 0,2nmol/sample. For a 15 l air sample, this corresponds to 0,6ng∙m–3 for HDI and 0,02ng∙m–3 for TDI.
The useful range, for a 5 l air sample, of the method is approximately 0,001µg∙m–3 to 200mg∙m–3 for TDI.
| Standards | Relationship |
| ISO 17734-1:2013 | Identical |
| EN 482:2012+A1:2015 | Workplace exposure - General requirements for the performance of procedures for the measurement of chemical agents |
| ISO 13137:2013 | Workplace atmospheres — Pumps for personal sampling of chemical and biological agents — Requirements and test methods |
| ENV 12260 : DRAFT 1996 | |
| ISO 16200-1:2001 | Workplace air quality — Sampling and analysis of volatile organic compounds by solvent desorption/gas chromatography — Part 1: Pumped sampling method |
| EN 13205:2001 | Workplace atmospheres - Assessment of performance of instruments for measurement of airborne particle concentrations |
| ISO 5725-2:1994 | Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method |
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