Quantitative determination of phosgene doses by reflectometric badge readout

Niessner, Reinhard
July 2010
Analytical & Bioanalytical Chemistry;Jul2010, Vol. 397 Issue 6, p2285
Academic Journal
Commercial phosgene dosimeter badges are lacking precise and sensitive analysis when used only by visual comparison to a color reference. To meet the discussed occupational standard set to 54 ppm min, objective quantification by reflectance measurement is proposed. At 573 nm, the pink dye (“Koenig´s salt”) formed at the membrane surface by reaction of phosgene, and aromatic amine shows a strict linear relationship in reflectance between doses of 10 and 300 ppm min. The detection limit is calculated to 29 ppm min.


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