ELECTRODIALYTIC WATER PURIFIER WITH ION EXCHANGE MATERIAL AND METHOD FOR EMOVING IONIC CONTAMINANTS

摘要

An apparatus for removing charged contaminants from a water stream. The apparatus can be figured to provide the decontaminated water stream to an analytical system. Methods of use of the same are also disclosed. In one embodiment the apparatus comprises (a) a cation exchange membrane (14) and an anion exchange membrane (16), their walls (14a, 16a) defining a purifying flow channel (18) therebetween,(b) a cation chamber (20) defining a cation flow channel, (c) an anion chamber (22) defining an anion flow channel, (d) a cathode (30) and an anode (32), (e) flow-through first ion exchange medium (24) in the cation flow channel, (f) flow-through second ion exchange medium (28) in the anion flow channel, and (g) a zone within the purifying flow channel (18) free of flow-through ion exchange medium.