Liquid purification or separation – With means to add treating material – Chromatography
Patent
1990-04-19
1992-02-11
Therkorn, Ernest G.
Liquid purification or separation
With means to add treating material
Chromatography
210181, 210634, 210656, 210659, 55386, 422 70, B01D 1508
Patent
active
050873601
ABSTRACT:
A field-portable supercritical fluid extraction apparatus uses an SFE solvent delivery means, SFE solvent cooling means, and reciprocating high pressure liquid chromatography pump having a cooled pumphead. A solid matrix sample is contained within an extraction cell. The SFE solvent is preheated in the extraction cell oven before it is introduced into the extraction cell. After contact with the solid matrix the extraction effluent passes through a heated restriction tube before passing into a collection flask assembly having a collection solvent tube and a collection solvent condenser to condense collection solvent vapors entrained by escaping SFE solvent. The analytes are collected in the collection solvent. The SFE solvent cooling means, pumphead and collection solvent condenser are all cooled by the combination of a single stage thermoelectric device, liquid-cooled heat exchanger and convective heat sink.
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Fruchter Jonathan S.
Wright Bob W.
Electric Power Research Institute Inc.
Therkorn Ernest G.
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