i L i , ff 4 ,y,,,] | , | . ,,yygl peg i pa! rae Radiochemical Analysis Made December 1956-January 1957 Table 6. on Selected Marsh Plankton Samples d/n . os in each 6 106 Triv. Sample aliquot Insol. Total No?” ar?” Co Zn ? p39» 90 cg37 Bal 10 cel 4 _ppit R. E. Ru number used 5 1,722 ho 3,289 0 1.50r <1.5 <1 <1 8 0 <1 20 4 3 25 3 5.1 3 21 31 oF 47 1 6 ho 8 93°* 136 a hk -2, 245 55 Expected 0 6.4 Oo «i <1 <1 8.4 16 5 15 3.5 31 3 2 59 yy 12 - - 23 1 113 77 4 Based on zirconium count. ae The zinc separations were not satisfactory. On the basis of gamma spectrometry, wey 400 (see Figs. 11 and 12), a large part of the total gamma activity was contributed by zinc.