Chromatographic apparatus for analysis of ionic species

摘要

Apparatus and method for chromatographic quantitative analysis of a solution containing a plurality of species of cations. A sample of the solution is added to a first ion exchange resin bed containing cation exchange resin and eluted therefrom with a solution of developing reagent consisting of either AgNO3 or BaCl2, chromatographic separation of the cationic species being achieved as elution proceeds. The effluent from the first ion exchange resin bed is passed through a second ion exchange resin bed containing anion exchange resin in a form appropriate to the precipitation of whichever metal ion is provided by the developing reagent, i.e., chloride or sulfate forms. As elution proceeds the cations exit from the second ion exchange bed without destroying the ionic separation achieved in the first ion exchange resin bed. Each separated cationic species is quantitatively sensed by a detector such as a conductivity cell on exiting from the second ion exchange resin bed.