~24Te fourth peak in the original elution curve occurred at
pH 4.1.
As above,the fsotope comprising the peak was Mn+,
the
total Mm>4 in clam kidney sample I amounted to 38,500 d/m.
The last peak of the original elution experiment contained
a total of only 20 c/m over background and occurred at pH 4.1,
fraction 1.
Because of the low level of activity the identity
of the isotope or isotopes comprising the fraction was not determined; however, gr89, 90 are known to be eluted.at this position.
Sample II
Bonito liver sample II collected at Pox Island, Bikini Atoll,
September 23, 1956.
in Fig. €.
The elution curve for this sample is shown
The anions were not identified but had maximum PB
energies of .03 and .45 MEV and
7
peaks of .67 and .89 MEV.
The oxalate fraction contained Fe, Fe’, and Zr?9_Nb?>.
The activities of Fe-? (488 d/m) and Zr9°-Nb?> (100 d/m) were
determined from the
7
spectrum curve.
The identification of Fe? was made by mass absorption
observations.
The procedures used for oxalate fractions b and
¢ may be cited as examples of the method.
One-ml samples of oxalate fractions b and ¢,
after drying
under an infrared heat lamp, yielded counts of 11,400 and 1,240
cfm respectively in the windowless methane gas-flow counter.
After the plates were flamed their counts were 29,700 and 3,510
c/m respectively.
After each plate was covered with aluminum
foil of 4.7 mg/em= weight the observed counts were 174 and 8 cfm
respectively.
In a similar experiment with six Fe?> spikes the
averages of the counts were 6,190 c/m with only carrier-free Fe->
ue
-&
- 3d