Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1996-04-03
1998-02-10
Therkorn, Ernest G.
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210656, 210659, 95 82, B01D 1508
Patent
active
057165254
ABSTRACT:
Methods and apparatus for extracting an analyte from a sample using a field-portable extraction instrument. The preferred embodiment of the extraction instrument includes an extraction fluid source, a sample container, a valve element, a nozzle, and a collection trap vessel. The methods of the present invention include the steps of inserting the sample into the sample container, attaching the sample container to the instrument, and providing a quantity of pressurized extraction fluid from the pressurized extraction fluid source into the sample container to initiate the extraction process. Extraction is facilitated by directing the extraction fluid into the sample at a rapid flow rate such that the sample and extraction fluid are vigorously mixed and a sample/solvent mixture is created. The valve element is then operated to isolate the extraction fluid source and to fully close the sample container. As an optional step, heat may be applied to the closed sample container to create conditions for effecting supercritical fluid extraction. The valve element is then operated to direct a fluid/constituent mixture from the sample container section to the collection trap vessel. The analyte of interest that is present in the fluid/constituent mixture is thereby trapped.
REFERENCES:
patent: 4424131 (1984-01-01), Baird
patent: 5013443 (1991-05-01), Higashidate
patent: 5087360 (1992-02-01), Wright
patent: 5094741 (1992-03-01), Frank
patent: 5133859 (1992-07-01), Frank
patent: 5147538 (1992-09-01), Wright
patent: 5205987 (1993-04-01), Ashraf-Khorassani
patent: 5240603 (1993-08-01), Frank
patent: 5322626 (1994-06-01), Frank
patent: 5356538 (1994-10-01), Wai
patent: 5472612 (1995-12-01), Maxwell
Dudley Mark Z.
Hewlett-Packard Co.
Therkorn Ernest G.
LandOfFree
Portable extraction instrument does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Portable extraction instrument, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable extraction instrument will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2074361