A general description of electrodeionization(EDI), the working principle of EDI, and the objective, method, results, discussions, conclusions and suggestions of the tests are stated.

• 介绍填充床电渗析的概述,填充床电渗析器的工作原理,用该器制备超纯水试验的目的、方法、结果、讨论、结论和建议。