Perchlorate Selectivity of Anion Exchange Resins as Evaluated Using Ion-Selective Electrodes.

The selectivity coefficients reported for perchlorate of the high selectivity on anion exchange resins (AXRs) have not been consistent with one another. Possible errors by the unique use of four parameters (concentrations of two anions in two phases) were experimentally verified. The concentrations of perchlorate buffered at low levels (10 - 10 mol L) by two forms of AXRs were successfully determined by potentiometry with a perchlorate ion-selective electrode.