Species-Differentiating Continuous Monitor for Airborne Acids.

Abstract : Further testing of a wetted wall column scrubber for preferential removal of nitric acid vapor showed a high collection efficiency for vapor and a high rejection of ammonium chloride particles. Calculations show that the wetted wall column can be designed to give a 1-2 minute response time. For sulfuric acid mist collection commercially available ultrasonic nebulizers must be modified. Work was begun on the investigation of steam condensation as a means of collecting particles. (Author)