Title: Method of electric field flow fractionation wherein the polarity of the electric field is periodically reversed

Abstract

A novel method of electric field flow fractionation for separating solute molecules from a carrier solution is disclosed. The method of the invention utilizes an electric field that is periodically reversed in polarity, in a time-dependent, wave-like manner. The parameters of the waveform, including amplitude, frequency and wave shape may be varied to optimize separation of solute species. The waveform may further include discontinuities to enhance separation.

Inventors:

Stevens, Fred J ^[1]

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1. Naperville, IL

Issue Date:

1992-01-01

Research Org.:

Argonne National Lab. (ANL), Argonne, IL (United States)

OSTI Identifier:

868407

Patent Number(s):

5133844

Assignee:

United States Department of Energy (Washington, DC)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS B03B - SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

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B - PERFORMING OPERATIONS B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS B03B - SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS

B03B5/00 - Washing granular, powdered or lumpy materials

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

G01N30/0005 - {Field flow fractionation}
G01N30/8658 - {Optimising operation parameters}
G01N2030/0035 - {electrical field}
G01N2030/007 - {programming of driving force
G01N27/44773 - {Multi-stage electrophoresis, e.g. two-dimensional electrophoresis}

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DOE Contract Number:  

W-31109-ENG-38

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

method; electric; field; flow; fractionation; polarity; periodically; reversed; novel; separating; solute; molecules; carrier; solution; disclosed; utilizes; time-dependent; wave-like; manner; parameters; waveform; including; amplitude; frequency; wave; shape; varied; optimize; separation; species; discontinuities; enhance; carrier solution; electric field; novel method; enhance separation; periodically reversed; separating solute; field flow; flow fractionation; /204/