Diffusion cell
US5198109A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1992 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Mar 23, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2013/003
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A diffusion cell to facilitate the automated removal of test aliquots of liquid from a receptor chamber of the diffusion cell so as to determine percutanous absorption through a membrane of a donor fluid from a donor chamber into the receptor chamber of the diffusion cell. There is utilized a sampling port through which the test aliquot is to be removed, the removal being achieved by means of a sample tube which is to be movable into and out of the receptor chamber. Within the receptor chamber is located a stirring device in the form of a helical coil which is to be rotated to achieve stirring and homogeneous mixing of the liquid within the receptor chamber. A refilling tube connects also with the receptor chamber to add liquid into the receptor chamber as the test aliquot has been removed. A leveling tube within the sampling port is to restore the initial preset receptor liquid volume between sampling intervals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.