-17- Table 5. Summary of the radioassay by iton-exchange analysis of liver tissue of reef fish from Enibuk Island, July 11, 1957 Dowex 50 separation Fractions in order of elution 0.5% oxalic acid 5% ammonium citrate pH 3.5, b-m tt (Counts made in October Isotope Feo) d/m ash sample 1957 d/m/eg wet weight 11,872 516 zn0> 6,187 269 6 ft bt Cobl 5, 902 257 wom 4 C938 1,102 48 owen C069 489 21 pH 4.1, a-i Mn54 108 5 pH 5.1, b-k Sr 90 0 0 Mn5# 458 20 pH 3.5, 0o,p and Dowex 1 separation** Fractions in order of elution 6 M HCl 4 and 2.5 M HCl hon ow one Col! 3,968 172 Hom on C60 756 33 Zn©5 11,898 517 om 0.005 M HCl o4 6058 485 21 —— * Ash weight of sample 0.384 grams. **These fractions contained considerable amounts of manganese, cobalt, and zinc, indicating an overloading of the Dowex 50 cationic resin. 4 park gy ee