Abstract
Limed filter papers were exposed to analyzed concentrations of hydrogen fluoride under controlled conditions of temperature, dew point, concentration, windspeed, and time. The exposed papers were analyzed for their fluoride content. Within the limits of accuracy of the test setup, the following conclusions are made: Temperature, dew point, concentration, and time have little or no affect on absorption. Dose has little or no affect on absorption until dosages in excess of 400 to 600 ppm min, dependent on windspeed, are reached. Within the limits of 3 to 18 mph, absorption varies with dosage according to the following equation: μg/dm2/ppm min = 1.07 × windspeed (mph) +11