Abstract
An accurate and convenient sampling and analytical method was developed for airborne 2,4-toluenediisocyanate (TDI). A chromophoric derivatizing reagent was used to convert the TDI to a stable urea derivative during collection for subsequent quantification by liquid chromatography. The overall accuracy (at the 95% confidence level) and precision of the method are ± 7.9% and ± 10.0% respectively under laboratory conditions. Long term stability was observed for both the reagent coated sorbent tube and TDI urea derivative. A TDI concentration of 1 ppb can be detected by taking 15-1 sample volume.
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