Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1990-03-15
1992-07-28
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204299R, 204186, 204302, 2041821, G01N 2726, B01D 5702, B03C 502
Patent
active
051338440
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.
REFERENCES:
patent: 3207684 (1965-09-01), Dotts, Jr.
patent: 3506554 (1970-04-01), Broome
patent: 4440638 (1984-04-01), Judy et al.
patent: 4874507 (1989-10-01), Whitlock
patent: 5011022 (1991-04-01), Palepu et al.
Wolfgang Thormann et al "Focusing Counterparts of Electric Field Fractionation and Capillary Electrophoresis-Electrical Hyperlayer Field Flow Fractionation and Capillary Isoelectric Focusing" Journal of Chromatography 461 (1989) 95-101.
Karin D. Caldwell "Field Flow Fractionation" Analytical Chemistry, vol. 60, No. 17 (Sep. 1, 1988) 959A-971A.
Joe M. Davis et al "Retention by Electrical Field-Flow Fractionation of Anions in New Apparatus with Annular Porous Glass Channels" Analytical Chemistry vol. 59, No. 9 (May 1, 1987) 1339-1348.
J. Calvin Giddings "Field Flow Fractionation" Chemical & Engineering News (Oct. 10, 1988) 34-45.
J. Calvin Giddings "Field-Flow Fractionation-Extending the Molecular Weight Range of Liquid Chromatography to One Trillion (10.sup.12)" Journal of Chromatography 125 (1976) 3-16.
J. Calvin Giddings "Transport, Space, Entropy, Diffusion, and Flow-Elements Underlying Separation by Electrophoresis, Chromatography, Field-Flow Fractionation and Related Methods" Journal of Chromatography 395 (1987) 19-32.
Karin D. Caldwell "Electric Field-Flow Fractionation of Proteins" Science, vol. 176 (Apr. 21, 1972) 296-298.
Fisher Robert J.
Glenn Hugh W.
Moser William R.
Niebling John
Starsiak Jr. John S.
LandOfFree
Method of electric field flow fractionation wherein the polarity does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of electric field flow fractionation wherein the polarity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of electric field flow fractionation wherein the polarity will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1685333