Abstract
The value, significance and advantages of the use of impregnated membrane filters as collectors for traces of gases in the atmosphere are described. An experimental test set-up for evaluating flow rates was used to show that the Adzumi flow equation describes the flow of gas through a membrane filter. Equations are developed to describe the flow rate as a function of the pressure drop across the filter and to describe the porosity as a function of pore size. Considerations of the theoretical molecular collisions with the wall are shown to indicate practicability of the use of membrane filters as efficient gas collectors.