Apparatus for field-flow fractionation
US9897577B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2015 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | Feb 29, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/328
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to an apparatus for field-flow fractionation and to a method for separating samples by means of field-flow fractionation using this apparatus. The apparatuses of the invention comprise one or more reservoirs, a pump, a first flow volume splitting device, two valves for flow control, an injector, a separation channel having a first connector at a first end and a second connector at a second end or an AF4 separation channel having a first connector at a first end, a second connector at a second end and a third connector between the first and the second ends, optionally a second flow volume splitting device, a back-pressure element, one or more detector(s), a flow volume control device and one or more waste container(s). The apparatuses of the invention are characterized in that they comprise a valve for flow control in a first flow path and a second flow path which connect the pump to the first or the second or the third connector of the separation channel and that these valves are switched alternately in a controllable time ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.