Integrated instrument for supercritical fluid sample extraction,

Details Integrated instrument for supercritical fluid sample extraction, Integrated instrument for supercritical fluid sample extraction,

1991-07-09

1993-03-30

Sever, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210137, B01D 1104

Patent

active

051981157

ABSTRACT:
An integrated sample extraction and separation system includes a number of substantially identical supercritical fluid extraction modules and sample separation modules connected in common to a source of supercritical fluid and modifier and to instruments for sample analysis. Each of the supercritical fluid extraction columns is provided with separate pressure and temperature controls. Preferably, each sample separation module provides the choice of sample separation by dissolving the extracted sample in solvent, by adsorption, or by size exclusion chromatography. Either the supercritical fluid or various solvents may be used as the mobile phase in the sample separation step.

REFERENCES:
Analuytical-Scale Supercritical Fluid Extraction, pp. 633A to 642A by Steven B. Hawthorne Analytical Chemistry vol. 62 No. 11, Jun. 1, 1990.
Extraction of Pesticides from Soil with Supercritical CO.sub.2 by H. Engelhardt, Journal of High Resolution Chromatography & Chromatography Communications, p. 726, 1988.
Fundamentals and Applications of Supercritical Fluid Extraction in Chromatographic Science, by Jerry W. King pp. 355-364, Journal of Chromatographic Science, vol. 27 Jul. 1969.
Exclusion Chromatography in Dense Gases: An Approach to Viscosity Optimization by J. Calvin Giddings et al, pp. 243-249 Analytical Chemistry, vol. 49, No. 2, Feb. 1977.
Size Exclusion Chromatography of Polystyrenes with Supercritical Dichloromethane by Chuzo Fujimoto et al Journal of Chromatographic Science, vol. 27, Jun. 1969 pp. 325 and 327.
Supercritical Fluid Extraction Enhancer, PB90-238114 (U.S. Agricultural Research Service, Jun. 12, 1990.
On-Line Supercritical Fluid Extraction/Chromatography System for Trace Analysis of Pesticides in Soybean Oil and Rendered Fats by B. Murugaverl et al J. Microcol. Sep. 3 11-16 (1991).

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