TDI-ANALYSIS AND MDI-ANALYSIS DURING FIRE SIMULATION TESTS - FILTER-VOLUME AND HIGH-VOLUME IMPINGER-SAMPLING

The sampling and HPLC-determination methods for TDI (toluene diisocyan ate) and MDI (diphenylmethane diisocyanate) during fire simulation tes ts have been given in detail. The preparation of the sampling filters with derivatizing reagents and the high-volume impinger sampling techn iques have been demonstrated. The measured TDI- and MDI-vaIues were in the range of about 8 to 15 mg TDI/m(3) and about 18 mg MDI/m(3) fire gases during ''steady'' fire conditions. The values reflect the kineti cs of the fire tests in a plausible way. This work was part of an Inte rnational Isocyanate Institute project, the results of which are publi shed elsewhere [1], [3].