Determination of isocyanates in air using 1-(2-methoxyphenyl)piperazine-impregnated filters: long-term sampling performance and field comparison with impingers with dibutylamine

The Annals of Occupational Hygiene
Carl J SennbroHåkan Tinnerberg

Abstract

Isocyanates may be harmful to workers and methods for monitoring air exposure in the field are necessary. The main aim of this study was to study the field performance of a method using 1-(2-methoxyphenyl)piperazine (2MP)-impregnated filters, by side-by-side comparison of long-term sampling with consecutive short-term samplings and also by short-term comparisons with other methods. Apart from using 2MP-impregnated filters, air monitoring was also performed by a modified 2MP method (FINMP) and by an impinger method using dibutylamine (DBA), which was the reference method. For short-term sampling the compared methods performed equally well for 2,6-toluenediisocyanate (2,6-TDI) and for isocyanic acid. For 2,4-toluenediisocyanate (2,4-TDI), the DBA method gave approximately 10% higher results according to linear regression than the 2MP method and for phenyl isocyanate, the DBA method gave significantly higher results than both the 2MP and FINMP methods. During long-term sampling (2-4 h) of TDI with the 2MP method, significantly lower levels were found compared with parallel sampling with consecutive short-term samplings. A time-dependent correction factor for long-term sampling was calculated to be 1.7 for 2,4-TDI and 1.5 for 2,6-T...Continue Reading

Citations

Feb 25, 2011·Journal of Occupational and Environmental Hygiene·Jennifer M ThomasenLeena A Nylander-French
Mar 18, 2008·The Annals of Occupational Hygiene·Håkan Tinnerberg, Christian Mattsson
Sep 29, 2009·The Annals of Occupational Hygiene·I LiljelindL A Nylander-French
Dec 28, 2011·The Annals of Occupational Hygiene·John WhiteMatthew Coldwell
Mar 28, 2012·The Annals of Occupational Hygiene·Adam V WisnewskiCarrie A Redlich
May 2, 2008·Environmental Health : a Global Access Science Source·Karin BrobergMargareta Littorin
Aug 21, 2013·The Annals of Occupational Hygiene·Daniel GylestamGunnar Skarping
Sep 18, 2007·International Journal of Hygiene and Environmental Health·Christian MattssonHåkan Tinnerberg
Jul 31, 2008·Journal of Occupational and Environmental Hygiene·H TinnerbergB A G Jönsson

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