Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1989-10-10
1991-08-06
Therkorn, Ernest G.
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210656, 2101982, 2105021, 55 67, 436161, B01D 1508
Patent
active
050375539
ABSTRACT:
A process of sample preparation prior to analysis for the concentration of an organic contaminant in an aqueous medium by (a) passing an initial aqueous medium including a minor amount of the organic contaminant through a polyolefin tube having an internal diameter of from about 0.01 to about 2.0 millimeters and being of sufficient length to permit the organic contaminant to adhere to the tube, (b) passing a solvent through the tube, said solvent capable of separating the adhered organic contaminant from the tube.
Further, a chromatographic apparatus for sample preparation prior to analysis for the concentration of an organic contaminant in an aqueous medium, said apparatus including a polyolefin tube having an internal diameter of from about 0.01 to about 2.0 millimeters and being of sufficient length to permit an organic contaminant contained within an aqueous medium passed therethrough to adhere to the tube is disclosed.
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Test methods for Evaluating Solid Wastes, Physical/Chemical Methods, SW-846, U.S. Environment Protection Agency, Office of Solid Waste and Emergency Response, 3rd Edition, District of Columbia (1987), pp. (Abstract-1), (3510-1-3510-7), (3520-1-3520-7), and (8080-1-8080-27).
H. C. Chow et al., "Polyethylene Powder as a Stationary Phase for Preparative-Scale Reversed-Phase High-Performance Liquid Chromatography," Depart. of Chem., Univ. of Calif., vol. 151, No. 3, pp. 357-362 (1978), Journal of Chromatography.
Del Mar Peter
Hemberger Barbara J.
Cottrell Bruce H.
Gaetjens Paul D.
Moser William R.
The United States of America as represented by the United States
Therkorn Ernest G.
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