GENERATION OF TEST ATMOSPHERES OF 2,4-DINITROPHENOL AND EVALUATION OFSAMPLING METHODS FOR ITS DETERMINATION IN AIR

A dynamic system for producing test atmospheres of 2,4-dinitrophenol t hrough evaporation of solid matter is described. A stream of nitrogen is passed through a thermostated U-tube filled with glass beads coated with 2,4-dinitrophenol, in order to generate a saturated atmosphere o f the compound. Performance of the described system at different tempe ratures, gas flow rates and humidities is shown. The use of impingers and denuder tubes for the collection of gaseous 2,4-dinitrophenol is a lso investigated.