Applications of EDI Devices in Inorganic Analysis

By John M. Riviello and Archava Siriraks, Ph.D.

EDI INSTRUMENTS LABORATORY WATER MONITORING TRACE ANALYSIS

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Abstract

Electrodeionization (EDI) is a well-established process for the production of deionized water (DIW) (1). Using conventional ion-exchange (IX) resins and IX membranes in combination with an applied electric field, EDI can produce a DIW product of consistent quality without the need for periodic chemical regeneration as required for conventional static mixed-bed deionization. EDI is typically used after reverse osmosis (RO) treatment to produce a DI product that is then polished using conventional mixed-bed deionization. Convention

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