title: Perchlorate Selectivity of Anion Exchange Resins as Evaluated Using Ion-Selective Electrodes.
abstract: 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 (10-6- 10-4mol L-1) by two forms of AXRs were successfully determined by potentiometry with a perchlorate ion-selective electrode. This gave reasonable coefficients. The coefficients for perchlorate on several AXRs were independent of the relative exchange (RE), in contrast to the previous reports. On the other hand, the coefficients for fluoride of the low selectivity that were examined for comparison decreased with an increase in RE, and the dependency was more remarkable for the resins of large exchange capacity.
authors.affiliation: Graduate School of Engineering, Nagoya Institute of Technology.
authors.forename: Kenji
authors.initials: K
authors.lastname: Yamamoto
authors.forename: Shin'ya
authors.initials: S
authors.lastname: Mitsuda
authors.forename: Naomi
authors.initials: N
authors.lastname: Ohtake
authors.forename: Natsuki
authors.initials: N
authors.lastname: Murashige
authors.forename: Satoshi
authors.initials: S
authors.lastname: Ohmuro
authors.forename: Akio
authors.initials: A
authors.lastname: Yuchi