133Xe was adsorbed from its mixts. with N2, Ar and air on activated C (grain size 1-3 mm or 3 mm) and on a mol. sieve 3 A at 0, -78 and -196°C under lab. conditions (gas flow 0,1-0,4 L/min) and then desorbed in N2 at 40-150°C. The adsorption degree on C was 99-100% in the whole temp. range. On the mol. sieve, the adsorption degree decreased from 100% at -196°C down to 0% at 0°C.