Purification of Trace Amount of Metal Impurity from Ultra Pure Water Using Membrane Purifier/Filter

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Solid State Phenomena (Volumes 103-104)

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265-268

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April 2005

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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[1] B. Parekh, K. Fujiwara, M. Komatsu, Y. Hashimoto, M. Amari: Clean Rooms, Vol. 17, No. 6, (June 2003).

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[2] B. Parekh, Y. Hashimoto, M. Amari, I. Funahashi: A2C2 Magazine, http://www.a2c2.com, (January 2004).

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[3] Dow Chemical Technical Information, "Dowex Ion Exchange Resins, Using Ion exchange Resin Selectivity Coefficient", http://www.dow.com. Figure 1: SEM Graft Membrane: A) HDPE non-woven, B) UPE micro porous membrane. Figure 2; Metal challenge to IE membrane, Cu, Na 50 ppb. 47 mmφDisc membrane, 20 ml/min Figure 3; Colloidal Fe purification, laminated membrane. 47mmφDisc membrane, pH 4.5, Fe 200 ppb. Figure 4; Metal impurity level with metal purifier/filter UPW line at device manufacture. Figure 5; Evaluation, MCLT comparison with and with out Metal Purifier/Filter.

DOI: 10.4028/www.scientific.net/ssp.103-104.265

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