| abstract |
Apparatus suitable for generating a high purity, aqueous product stream including one or more selected ionic species and using it as a chromatography eluent, comprises eluent generating means defining a source channel and a product channel, and comprises a permselective ion exchange membrane partitioning said source channel and product channel, said ion exchange membrane including exchangeable ions of the same charge as said selected ionic species and allowing transmembrane passage to ions of the same charge as said exchangeable ions and being resistant to transmembrane passage of ions of the opposite charge, means for applying an electrical potential between said source channel and product channel, chromatographic separating means, conduit means for directing aqueous product stream from said product channel to said chromatographic separation means, and means for supplying a liquid sample to said chromatographic separating means. |