Method, apparatus and system for producing eluent flow in liquid

Details Method, apparatus and system for producing eluent flow in liquid Method, apparatus and system for producing eluent flow in liquid

1979-05-04

1980-09-09

Adee, John

Liquid purification or separation

Processes

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

210198C, 210321R, B01D 1508

Patent

active

042216680

ABSTRACT:
A method for producing a flow of an eluent in liquid chromatography according to the present invention comprises displacing the eluent into a chromatographic column under the effect of an osmotic pressure of a solution of a substance with its concentration being maintained constant. An apparatus for performing said method comprises a source of pressure and a container with the eluent communicating with said source of pressure; the latter comprising an osmotic system consisting of two vessels and a semi-permeable membrane partitioning said vessels; one of the vessels is filled with a solvent, while the other is communicating with the container and filled with a saturated solution of the substance contacting with the substance in the solid phase disposed in the same vessel. A system for producing a flow of an eluent in liquid chromatography according to the present invention consists of at least two said apparatus series-connected therebetween.
The method for producing an eluent flow in liquid chromatography according to the present invention makes it possible to obtain a uniform flow of an eluent without pulsations within a wide range of pressures employed in liquid chromatography.
The apparatus for performing the method of the invention has no moving parts and eliminates contamination of the eluent.

REFERENCES:
patent: 3984315 (1976-10-01), Ernst et al.
patent: 4043906 (1977-08-01), Helmer
patent: 4124488 (1978-11-01), Wilson
Introduction to Modern Liquid Chromatography by Snyder et al., John Wiley & Sons, New York, N.Y., 1974, Chapter 4.

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