Accession Number : ADA599663


Title :   Field Evaluation of Solvent-Free Sampling with Di-n-butylamine for the Determination of Airborne Monomeric and Oligomeric 1,6-Hexamethylene Diisocyanate


Descriptive Note : Master's thesis


Corporate Author : AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT


Personal Author(s) : Heline, Tiffany R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a599663.pdf


Report Date : 27 Mar 2014


Pagination or Media Count : 111


Abstract : During this study, a field evaluation of a new sampling method using di-n-butylamine for the determination of airborne monomeric and oligomeric 1,6-hexamethylene diisocyanate (HDI) was performed. The Supelco ASSET EZ4-NCO Dry Sampler was compared to the Omega Specialty Instrument Co. ISO-CHEK sampler. Three specific questions were addressed: 1) can HDI oligomers be quantified using HPLC-MS; 2) do ASSET and ISO-CHEK samplers collect equivalent HDI monomer & oligomer concentrations; and 3) what is the relative cost of ASSET samplers verse ISO-CHEK. Side-by-side HDI air sampling was conducted during polyurethane spray painting operations. ASSET samplers were analyzed by HPLC-MS for HDI monomer and oligomers, including biuret and isocyanurate. The ASSET sampler collected significantly higher levels of HDI monomers, indicating ISO-CHEK samplers potentially underestimate true monomer exposures. HDI oligomer results were inconclusive. Finally, the analytical cost for the ASSET sampler was determined to be 50 percent less than ISO-CHEK resulting in a cost savings of $32 K over 5 years.


Descriptors :   *POLYURETHANE RESINS , ISOCYANATES , MONOMERS , OLIGOMERS , SAMPLING


Subject Categories : Plastics


Distribution Statement : APPROVED FOR PUBLIC RELEASE