Method and apparatus for fractionation using conventional dielectrophoresis and field flow fractionation
US6641708B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1999 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Aug 23, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/007
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and apparatus for discriminating matter in a chamber having an inlet port and an outlet port utilizing dielectrophoresis and field flow fractionation. A carrier medium is introduced into the inlet port and is directed from the inlet port to the outlet port according to a velocity profile. A programmed voltage signal is applied to an electrode element coupled to the chamber to form a dielectrophoretic force on the matter. The dielectrophoretic force is balanced with a gravitational force to displace the matter to positions within said velocity profile in the carrier medium to discriminate the matter. A chamber having a top and bottom outlet port may be utilized to withdraw a first portion of a carrier medium from the top outlet port at a first, controllable fluid flow rate and to withdraw a second portion of the carrier medium from the bottom outlet port at a second, controllable fluid flow rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.