AWALITICAL PROCEDURE FOR THE SEPARATIOW 4MD DETERMINATION OF RADIO IN 100 GRAMS OF SOIL ae 1. Except for the addition of 20 ug of Sr** carrier, Steps 1 2. Then the carvomts precipitate is dry, renove from the filt paper and trenefer to a pyrex glass tray. 18 of the Sr®® °° orecedure are carried out exactly the sam wey. Loe 3. Place in a 100°C oven and dry overnight. 4. Now break up the aggregated material with a spatula and c as well as possible with a pestle. S. Return the material to a 100°C oven amd dry again. 6. Finally place the dried precipitate in a copper radon co ing tube. Plug up both ends with pyrex wool, flush out tube with hydrogen and then seal. Record the time. 7. Yor full equilibriwm, allow a 0 day buildup, but shorter buildup times are useable. Messure the radon in an iors chamber radon counting apparatus. This method of radon collection is relatively wmtried, but s sample gave the following result, g Ra per g¢ Soil Senple Added Soil Mo. 1b o Pourd : 5.2 x 197? Spiked soil Mo. 1s 4.0 x 107 388. x 197? m0 66 ONCLASSIFIED 00131986.058