Cobalt solvent exchange data

The suppressor column, as well as enabling mercury to be determined, was also advantageous with respect to determination of copper, nickel, and in particular cobalt. Unfortunately, use of the suppressor column is detrimental to the determination of Cd(dtc)2 whose response disappears and Pb(dtc)2, whose response is considerably reduced. Presumably, these complexes are significantly retained as anionic complexes on the ion exchange suppressor. These data support conclusions obtained from voltammetric data in a conventional electrochemical cell, that the cadmium and lead complexes exist in anionic as well as neutral forms in the chromatographic solvent. Limits of detection for the simultaneous determination of lead, cadmium, mercury, copper, nickel and cobalt are given in Table 7.2. 

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