Abstract
The anion exchange resin Dowex 1X8, converted to the nitroso-R salt form, was used for adsorbing cobalt from large freshwater samples. Strongly acid titanium(III) chloride 10/sup -2/ M solution was found very effective at 60/sup 0/C as a new eluant and yielded complete recovery with a preconcentration factor of 100. Subsequent atomic absorption spectrometry determination of cobalt in the eluate was possible with no interference from titanium, reduced organics, and iron, copper, and nickel which partially might be fixed onto the resin. The suggested procedure allows a reproducibility of 5-10% for samples with cobalt concentrations in the range of 0.01-1 ..mu..g L/sup -1/. 15 references, 2 figures, 3 tables.
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