-147 - Ce 442, 44 7 104} C Ey 85 } { F 4 Ce l44_p,144 4 - C069 t_—\— col44p, 44 | 103+ ;be [ 4 ] ‘ — Ce 144_p, Pr 144 387 | ; [NOT IDENTIA- NOT IDENTIFIED , ] IED / C/M GAMMA/FRACTION r 1 4 Mn>4 102 | 1 i . lo pH28 ANIONS | pH 3.1 ] C3137 [ pH3.3 [ pHo — 5% AMMONIUM CITRATE ——_—— [resin Fig. 5 Secondary elution curve for the ammonium citrate pH 4.1 fractions from a Dowex 50 cationic resin column using 5 per cent ammonium citrate at pH 2.8, 3.1, 3.3, and 6.1.

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