25 March 2016 Metal reduction at point-of-use filtration
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Abstract
We explored the metal removal efficiency of Nylon 6,6 and HDPE (High Density Polyethylene) membrane based filters, in solvents of varying degree of polarity such as Cyclohexanone and 70:30 mixture of PGME (Propylene Glycol Monomethyl Ether) and PGMEA (Propylene Glycol Monomethyl Ether), In all the solvents tested, Nylon 6,6 membrane filtration was found to be significantly more effective in removing metals than HDPE membranes, regardless of their respective membrane pore sizes. Hydrophilic interaction chromatography (HILIC) mechanism was invoked to rationalize metal removal efficiency dependence on solvent hydrophobicity.
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Toru Umeda, Toru Umeda, Shusaku Daikoku, Shusaku Daikoku, Rao Varanasi, Rao Varanasi, Shuichi Tsuzuki, Shuichi Tsuzuki, "Metal reduction at point-of-use filtration", Proc. SPIE 9779, Advances in Patterning Materials and Processes XXXIII, 97791R (25 March 2016); doi: 10.1117/12.2218400; https://doi.org/10.1117/12.2218400
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