Method and apparatus for suppressed ion analysis in which a sample solution
of analyte (e.g., anion) in an eluent of electrolyte counterions (e.g.,
sodium), is chromatographically separated. Then, the counterions are
suppressed in a suppression zone and removed and used to convert the
analyte ions to salt form in a salt-converting zone. The suppression and
salt-converting zones may be contiguous or remote, and may be performed in
devices of the membrane suppresser type. Thereafter, the salts or acids or
bases formed from them (e.g., in membrane suppressor devices) are
detected. Also, salt conversion can be performed using two ion exchange
packed bed salt convertors in which one bed is on-line while the other is
regenerated, followed by a reversal of flow.
