~12Also, spike experiments were done at this Laboratory, in
cooperation with Kawabata*, using radioactive Mn, Co, Fe, Zn,
and stable Cu and Ni according to the method of Kraus and Moore
(1953).
The divalent transition elements were adsorbed onto and
eluted from a chloride-treated column of Dowex 1.
The elution
pattern for these elements is given in Table 3.
Table 3.
Elution pattern of divalent transition elements from
Dowex 1 by complexing with HCl solutions
Praction
Milliliters
of elutriant
Element
present
12 M HCl
10
Ni
6 M HCl
10
Mn
4 M HCl
10
Co
2.5 M HCl
10
Cu
0.5 M HCl
10
Fe
0.005 M HCl
20
an
Distilled
water
10
-~
Ignited resin
-~
an
In addition to the above described spike runs, ion-exchange
separations were made on five samples from Bikini and Eniwetok
Atolls.
These included four biological samples and one soil sam-
ple as follows:
I
Clam kidney, Belle Island, Eniwetok Atoll,
collected September 22, 1956.
Dr. Toshiharu Kawabata,
of Health, Tokyo, Japan
on leave from the National Institute