ADSORPTION OF RADON BY GLASS S. C. LIND A N D ROBERT LIVINGSTON School of Chemistry, University of Minnesota, Minneapolis, Minnesota Received September 18, 1856
During the course of certain radiochemical experiments it was noticed that radon which WBS kept for several days in Pyrex bulbs was in part strongly adsorbed on the glass (1). The bulbs were thin walled, and had volumes of approximately 0.1 cc. The pressure of the impurities which accompanied the radon wag never greater than a few millimeters, and was probably in most cases less than 1 millimeter. The bulbs were blown from clean tubing, but were not subjected to any chemical cleaning after being made. The sealed bulbs containing the radon were introduced into a horizontal tube which was attached by 20 cm. of 2-mm. capillary tubing TABLE 1 Evidence f o r the slow irreversible adsorption of radon on glass I
mc.
156.5 188.5 119.7 102.5
I
hours
17.5 37 49 68
per cent
