1 r a 4 | “ L 4 105 + r Sb125 t 4 : ] | z O _— « u o wi Zi04 + a r = Uy { : 1 ; L 4 103 + | aon HCl ANIONS Fig. | 05% pH 3.5 | pH 4.1 \46] 5.1 |s.6l6.1 OXALIC], 5% AMMONIUM CITRATE ACID Primary elution curve for a Kabelle island soil sample from Dowex 50 cationic resin.

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