Evaluation of Indoor Air Pollution of Polyurethane Industries With Emphasis on Exposure With Methylene Diphenyle Diisocyanate (Mdi)

Diisocyanates are used as a initial chemical material in different factories such as surface coatings,polyurethane foams, adhesives, resins, elastomers, binders and sealants. in the polyurethane workplace thereare aerosols of diisocyanates which has important to effect on workers. they can also be exposed to partialreaction of isocyanate-containing intermediates formed during polyurethane production. the main objectiveof this study pointed on assessment of exposure risk factors with mdi in the workplace, determination of mdiconcentration and biomonitoring of mda in polyurethane industries. nisoh (national institute foroccupational safety and health) 5522 sampling and analysis method was used by midget impinger containeddimethyl sulfoxide with tryptamine. hplc (high performance liquid chromatography) was employed for airsampling analysis and gc (gas chromatography) for urine analysis. getting personality data was carried outby health surveillancequestionnaire and multiple linear regression models with anova test was used for thestatistical analysis. the result of study showed that there was a diisocyanate pollution (mdi > 96.6ilg/m3) andit have seen in the workers' urine. a new approach to assess isocyanate pollution in the workplace is risk factorassessment simultaneously with indoor air pollution and biological monitoring.