the amountof gr90 present was calculated from the amount of 90
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,
was not accomplished in the primary elution from Dowex 50.
1957,
Four of
the fractions contained morethan 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 Sb 125 Ru106_ Ry 106 and Zr95-Nb95;
the oxalic acid fraction,
Fed and traces of Zr95-Nb95; the ammonium citrate pH 4.1 fraction,
cel44_ppi44 ,
C8
6,137 ,
Mn”~~
54
and C089, and the ammonium
citrate
pH 4. 6 fraction, Ca!37 ana sr9°_
Anion Fraction
The anion fraction was passed through a Dowex 1 resin and the three
radioisotopes present were collected indifferent fractions (Fig. 2).
The Sb!25 was collected in the 0.1 M oxalic acid and the Ru}96-Rp10 as
opt
ha