Determination of airborne 2,4-toluenediisocyanate vapors.
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 the TDI urea derivative. A TDI concentration of 1 ppb can be detected by taking a 15-1 sample volume.
D000388:Air / Q000032:analysis*; D000393:Air Pollutants / Q000032:analysis*; D000395:Air Pollutants, Occupational / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D002853:Chromatography, Liquid; D003485:Cyanates / Q000032:analysis*; D014051:Toluene 2,4-Diisocyanate / Q000032:analysis*
D000393:Air Pollutants; D000395:Air Pollutants, Occupational; D003485:Cyanates; D014051:Toluene 2,4-Diisocyanate