Air monitoring is important to assess workplace chemical concentrations. Information collected from air monitoring helps occupational health and safety professionals, called industrial hygienists, to determine whether there is potential for worker overexposure and to take preventative measures. A variety of chemical sampling and analysis techniques are used to monitor chemical concentrations in the air.
MDI and TDI generally react quickly with compounds that contain an active hydrogen group or groups. Therefore, to allow for meaningful workplace measurements, methods used for monitoring airborne concentrations must be capable of trapping and derivatizing the diisocyanate(s) to a stable derivative(s) in the field.