tin was used.
In this procedure the sample in 0.1 M oxalic acid and
the eluting agents (see Table 2) were passed through a 0. 28 em? x 10
cm-columnof anionic resin (Dowex 1 ) of 100-200 meshat a flow rate
of 0.2 ml/min.
The fractions were collected in test tubes, and, using
a gamma spectrometer,
the total gammaactivity and the specific
radionuclides then were determined.
Table 2. Summaryof the eluting procedure and the radioisotopes
eluted from the Dowex 1 anion-exchange resin
Volume in
milliliters
Fraction
Isotopes eluted
20
gpi25
pH 4.8 a-d
33
gb 125
e-f
18
Sb 125
10
gp 125
54
Sb!25, Ry 06. Ry, 106
Sample eluate
0.1 M oxalic acid
1 M H,SO, a
b-f
Distilled H,O
100
eo
12 M HCl
100
Ry 106. pp, 106
Resin
--
sp!25, zr? 5-Nb??
The presence of Sb
125
in the sample was verified by analyzing the
anion fraction with a standard radiochemical precipitation procedure.
1
The Sb 53 precipitate obtained in this separation was dried and analyzed
2