Cation-exchange-hiba

Fig. 6.16. Ion-exchange separation of seven lanthanide cations. Mobile phase 4.0 mM ethylenediamine and 3.0 mM o-HIBA, pH 4.5. Column 20-/xm, 35 cm x 2-mm i.d., sulfonated cation exchange resin. Detection conductivity. (Reprinted with permission from ref [2], copyright 1983 American Chemical Society.)...

The effect of multi-charged cationic species on the retention observed for different metals is illustrated in Table 6.3. Here, the ion-exchange capacity of a column (Cig) is varied by using different mobile phase concentrations of n-octanesulfonate. Equations (17) and (18) show the relationship between the ion-exchange capacity of a column and the retention of a metal species. The concentrations of complexing agents used throughout these experiments were constant 58.2 mM a-HIBA and 8.8 mM tartaric acid, pH 4.1. 

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