Abstract A sample cell for use in a spectrophotometric instrument and a stirrer for mixing sample and reagent in the cell. The cell is formed with closely spaced parallel planar sidewalls and two end walls of radiation permeable material. The cell is disposed so that the end walls lie in the optical path defined between the source of radiation and the radiation detector in the instrument. A stirring element is positioned in the cell with its magnetic axis parallel to the sidewalls of the cell. A rotatable drive magnet is positioned outside of the cell so as to rotate the stirring element about an axis perpendicular to the sidewalls so that the plane of rotation of the stirring element is parallel to the sidewalls. A plurality of such cells may be stacked in parallel relationship and a single drive magnet employed to rotate stirring magnets in the cells.
Inventors
👤 A Petersen
👤 J Hoffa
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-29 20:14
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/45; B01F33/452
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
A combination comprising: a plurality of sample cells, each comprising a pair of closely spaced, substantially parallel planar sidewalls and two endwalls defining a sample chamber therebetween, the cells being in juxtaposition relative to one another with the respective sidewalls of the cells disposed parallel to each other, a magnetic stirring element positioned in each chamber with its magnetic axis parallel to the sidewalls, and rotatable magnetic means positioned outside one cell for rotating the elements about a common axis perpendicular to the magnetic axes of the elements and the sidewalls, whereby the plane of rotation of each element is parallel to the sidewalls.
Claim 2
Dependent Claim
104 words
A combination comprising: a plurality of sample cells, each comprising a pair of closely spaced, substantially parallel planar sidewalls and two endwalls defining a sample chamber therebetween, the cells being in juxtaposition relative to one another with the respective sidewalls of the cells disposed parallel to each other, a magnetic stirring element positioned in each chamber with its magnetic axis parallel to the sidewalls, and rotatable magnetic means positioned outside one cell for rotating the elements about a common axis perpendicular to the magnetic axes of the elements and the sidewalls, whereby the plane of rotation of each element is parallel to the sidewalls.
Claim 3
Dependent Claim
23 words
The combination of claim 9 wherein the rotatable magnetic means includes a single magnet disposed in substantially parallel planar relation to the sidewalls.
Claim 4
Dependent Claim
18 words
The combination of claim 9 wherein the endwalls of each cell are formed of a radiation permeable material.