the amount of Sr?0 present was calculated from the amountof y20
recovered.
15
The presence of y?
0
was confirmed by determining
the decay rate of the sample.
RESULTS
Primary Elution from Dowex 50
As shown in Figure 1 and Table 1, a complete separation of the
radioisotopes from Kabelle Island soil collected
on July 18, 1957,
was not accomplished in the primary elution from Dowex 50.
Four of
the fractions contained more than one radioisotope and it was not
possible to determine accurately the amounts of the different radioisotopes in the fractions.
Consequently, secondary elutions were
required to separate the isotopes.
The anion fraction was found to
contain Sb125, Ru!06. py, 106 and Zr95-Nb95, the oxalic acid fraction,
Fe!) and traces of Zr95.Np95, the ammonium citrate pH 4.1 fraction,
Cel44.p, 144 csi37 Mn°~
54
and C080, and the ammonium citrate
pH 4. 6 fraction, cal? and sr90_
Anion Fraction
The anion fraction was passed through a Dowex 1 resin and the three
radioisotopes present were collected in different fractions (Fig. 2).
The Sb!25 was collected in the 0.1 M oxalic acid and the Ru/06_Ry106