-25- T DOWEX-1 SEPARATION ON io*t zr? P Coo?38,60 C er ~ ° - on, ioe B i . 5 FRACTION fF 2 : = C re - 95 10" Fe Fe 7 q = 57,5860 Co’ 7 4 643 ~ 2 7 4 5 9 ome — r = “ + 2 [6 4 eels 51a Te - HCI 3 = = = _ L tpi Cr Mn’ + TRACE Con” > 10 “ OF FRACTION|_ E C/ Ma/ 10° FRACTION. C/Ma/ a a Ho ‘O11, pH 4.) AMMONIUM CITRATE Teale? Peele exal OX. [22Talk CITRATE —~» Fig. 6 Elution curve for bonito liver sample II, Fox Island, Bikini Atoll, Septem- ber 23, 1956, from a Dowex 50 cationic resin column and the elution curve for a further elution of the pH 4.1 rraction from a Dowex 1 anionic resin column. 3