10 cro TT Tr r co rr P 12 MEV | 2 4 7 =! RE 3.3 c-h 10" P| a 58 oa 4 Co T 58 L . a -8l “i MEV “ MEV | 7 7 «6 GAMMA ACTIVITY 4 10° |! 4 C 2 C \ ; -NITROSO(-NAPHTHOL—> ,| COBALT SEPARA10 E TION ON | RE 3.3 4 J po - pe = pLLttrrt pitipyirs 1.2 Fig. 4 4 6 MEV 8 Lo 12 4 Gamma spectrum curves of the pH 3.3 c-h ammo- nium citrate fraction from clam kidney sample I eluted on Dowex 50 and of ane-nitroso-A naphthol cobalt separation done on the pH 3.3 e-h fraction.

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