B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 69/10 (2006.01) B01D 11/04 (2006.01) B01D 61/00 (2006.01) G01N 1/00 (2006.01) G01N 1/10 (2006.01) G01N 1/34 (2006.01) G01N 30/00 (2006.01) G01N 30/02 (2006.01) G01N 30/08 (2006.01) G01N 30/06 (2006.01) G01N 30/14 (2006.01) G01N 33/18 (2006.01)
Patent
CA 2136011
2136011 9325293 PCTABS00028 A reversed permeation membrane assembly and method for analyzing one or more compounds of interest from a sample solution. The membrane assembly includes a semi-permeable membrane (15) of predetermined thickness and length, and having inner and outer surfaces. The membrane (15) is attached adjacent its outer surface to a substantially rigid membrane support (17), and a non-porous barrier (18) contacts the outer surface of the membrane to prevent permeation of compounds beyond the outer surface in use. In a preferred embodiment, the semi-permeable membrane assumes a substantially tubular conformation through which sample solution may be passed. The membrane support (17) also preferably features a tubular conformation within which the semi-permeable membrane (15) is mounted. Because of its unique structure and improved efficiency, the assembly of the present invention may be incorporated for in-line use with liquid and gas chromatography devices and GC/MS units. In some applications, the extractant can even be flowed through the membrane cell to collect analytes and directly to an LC column for analysis in a substantially non-stop manner.
Mccabe Terrence
Melcher Richard G.
O'connor Paul J.
Smart & Biggar
The Dow Chemical Company
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