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FIGuRE 1
Il. NEW YORK OPERATIONS OFFICE, AEC
Analytical methods for determining total strontium, total radiostrontium, and Sr—90 are
discussed. The majority of the samples encountered were bone, soil, vegetation, or foods. Where
different procedures are required for handling these different types of samples, the methods are
given separately.
A. Separation of total radiostrontiun from five grams of bone ash:
1. Ash the bone sample in nickel crucible at 900°C.
2. Grind in a mortar to a fine powder.
3. Weigh out 5 grams into a 250 ml centrifuge bottle.
4, Add 44 ml of water and then slowly add 154 ml of 90% nitric acid to bring concentration
to 75% HNO:.
5. Add 20 mg of Sr carrier (as Sr(NO,).) in 2 ml of solution.
6. Stir rapidly for thirty minutes.
(Mechanically)
7. Centrifuge for 10 minutes at about 2,000 rpm.
8. Decant, dissolve the precipitate in 23 ml of water and transfer to a 250 ml beaker, add
slowly 77 ml of 90% HNO, and stir mechanically for thirty minutes.
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