Table 1. Summary of the volumes used and the radioisotopes eluted
from Dowex 50 resinin the primary ion-exchange separation of the isotopes in Kabelle Island soil collected July
18, 1957
Volume in
Fraction
milliliters
Anions
Isotopes eluted
490
Ruy 106_Rp,106
Sb 125. Zr95-.np?5
HCl wash
200
Sb 125
0.5% oxalic acid
300
Fe?)
5% ammonium citrate
pH 3.5
200
pH 4.1 a
47
d
53
b
58
37
Cel44_ py 144. an54, C5137. C960
Cel44_p ri44! Mn°4. C_l37
Cel44pel 44. win54
pH 4.6
100
C137, 5,90
pH 5.1
100
gr 90
pH 5.6
100
gr90
pH 6.1
100
“=
ww
a
Secondary Elutions
<p b
Three of the above fractions were subsequently treated by other ionexchange methods for more complete separation of the individual isotopes.
Rh95
The anion fraction contained the unknown isotope as well as Ru!06_
In order to separate the unknown isotopes a modification of the
method of Smith and Reynolds
18
for separating tellerium, antimony, and