4Finlay J M, Hango J T, Hango R A. A novel approach to a pharmaceutical R&D high purity water system[J]. Phar Eng, 1995, (5/6): 88-96.
5Parise P L. Demineralization: the use of ionpure continuous deionization for the production of pharmaceutical and semiconductor grades of water[J]. Ultrapure Water, 1990, 7(8):14-16.
6Ganzi G C, Parise P L. The production of pharmaceutical water using continuous deionization post-reverse osmosis[J]. Journal of Parenteral Science andTechnology, 1990, 44(4): 231-341.
