Field-portable apparatus and method for analytical supercritical fluid extraction of sorbent materials
US5087360A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1990 |
| Grant date | Feb 11, 1992 |
| Priority date | — |
| Expiry date | Apr 19, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/326
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.