CRITICAL-REVIEW OF METHODS OF SAMPLING, ANALYSIS, AND MONITORING FOR TDI AND MDI

This article is a critical review of certain methods that have been us ed for the sampling, analysis, and monitoring of toluene diisocyanate (TDI) and methylene bisphenyl diisocyanate (MDI). Only those methods t hat have received relatively widespread application are addressed. The review includes a ''tutorial style'' discussion of basic definitions, and basic principles and procedures of qualify control and metrology for sampling, analysis, and monitoring. Recommendations are given for future work in this area. Proper exposure assessment is critical in th e risk analysis process, since both exposure and effect measurements a re required.