Liquid purification or separation – Processes – Chromatography
Patent
1995-09-28
1997-12-02
Fortuna, Ana
Liquid purification or separation
Processes
Chromatography
2101982, 210511, 422 50, 422 59, 436163, B01D 1508
Patent
active
056932286
ABSTRACT:
An apparatus is described for carrying out solid phase microextraction and analysis of analytes in a fluid carrier in which a fiber within a housing is vibrated by a vibrating means during microextraction. The housing contains access means so that the carrier and analytes can be brought into contact with the vibrating fiber during the extraction stage. In a preferred embodiment of the present invention, the vibrating means comprises a membrane, a solenoid for vibrating the membrane, a frame, a retainer mounted on the frame for holding the solenoid, a holder for the membrane, and a retainer arm having one end connected to the retainer and the other end attached to the holder. A method for microextraction and analysis is also described in which a vibrating fiber is placed into contact with analytes to be analyzed in a suitable carrier deposited in a container for a sufficient period of time for microextraction to occur. Subsequently the fiber is removed and placed into a suitable analytical instrument for desorption and analysis with respect to at least one component on the fiber.
REFERENCES:
patent: 4521622 (1985-06-01), Andoh et al.
patent: 4930898 (1990-06-01), Miller-Ihli
patent: 5403489 (1995-04-01), Hagen et al.
patent: 5496741 (1996-03-01), Pawliszyn
patent: 5565622 (1996-10-01), Murphy
Geppert Helmut Gunther-Heinz
Koehler Wulf Hinrich
Berkowitz Edward H.
Fortuna Ana
Varian Associates Inc.
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