| Popis: |
Comprehensive industrial hygiene evaluations were performed in three flexible polyurethane foam manufacturing facilities. General area air samples were collected for determining aliphatic amines where these substances were used as catalysts in the foam. Because it was unclear which sampling medium was most appropriate to use when collecting these amines, several media were tried. In one comparison of performance, sample pairs consisting of a Thermosorb[rgrave]/A tube and an acid-filled impinger were used to collect an aliphatic amine ether (2, 2'-oxybis[N, N-dimethyl]ethylamine or bis[2-dimethylaminoethyl]ether) and an alicyclic amine (1, 4-diazabicyclo[2, 2, 2]octane or triethylenediamine). Both samples in each pair were collected under identical conditions of sampling duration, flowrate, and environmental parameters such as temperature and humidity. Analysis of the Thermosorb/A tubes was performed with a gas chromatograph and a thermal energy analyzer (GC/TEA) with mass spectrometric confirmati... |
