Table 1.
Results of radiochemical separations by ton exchange columns and precipitation
techniques on five plankton samples in and near the Pacific Proving Ground.
I
Plankton
(7,8,9)
75,000
d/m/g ash
Per cent
Isotope
RyL06_py106
Zr79-Nb9D
Celtppl 44
g789-90**
C3137 (Bal37m)
of total
activity
7.1
24.9
4.7
0
0
IT
Plankton
Lil
Plankton
(13,14,15)
28,700
d/m/gash
Per cent
of total
activity
(43,44,45,46)
-
198, 000
d/m/g ash
Per cent
of total
activity
9
KWo
0
IV
Plankton
(50,51,52,53)
127,000
a /m/g ash
Per cent
of total
activity
0
V
.
Plankton
(57,58,59)
48,000
d/m/g ash
Per cent
of total
activity
0
12.5
13.7
5.7
13.2
8.0
not determined
3
d.1
0.4
0.3
0.3
not determined
0
trace
O
0.3
0
0
0
Mn 54
0.1
FeDD
19.4
19.2
12.7
27.6
38.8
Feo9
0
0
9
0
0
CobT
9.9
8.5
15.5
6.1
4.6
C958
15.0
13.8
25.9
10.8
5.7
C960
0.9
0.8
1.3
0.8
1.0
zn©5
18.0
13.8
17.3
32.3
43.9
* The data are corrected to date of collection
-** Chemical separations for $r89-90 were madg on duplicate aliquots in addition to
Gl
the resin column separations.
Neither gr59 nor Sr90
was detected.
'
C