Sample cell and stirrer for spectrophotometry
AssigneePye (Electronic Products) Limited
InventorsTrevor J. Stockdale, Anthony R. L. Moss
Life of this patent
Estimating the term…
Abstract
A displaceable combination of a sample solution cell and a one-piece plastic stirrer is provided for spectrophotometry. The cell has an opening at one end through which the stirrer is inserted and arranged for reciprocation in the cell by engagement of a portion outside the cell. The stirrer is also arranged to sit in the cell during passage of radiation therethrough upon spectrophotographic measurement of the sample.
Claims17
A cell arrangement for spectrometric instruments comprising a sample cell positioned in a radiation path for permitting passage of radiation;
- a one-piece plastic stirrer positioned in a radiation transmissive region of said sample cell, said stirrer comprising:
- a body portion having opposed limbs extending exterior to said sample cell, said body portion including a flange at its outer end having an aperture therein to provide a path for fluid to communicate freely with the interior of said sample cell;
- said flange designed to permit reciprocating said stirrer in said sample cell in a direction perpendicular to the direction of the radiation path;
- said opposed limbs including, within the interior of said sample cell, an intermediate region of reduced cross-sectional dimensions, and an inner-end-region of substantially increased cross-sectional dimensions;
- said inner-end-regions of said opposed limbs being spaced apart to permit radiation to pass therethrough and including a chamfered end-portion for contacting closed end of said sample cell.
A stirrer for use in conjunction with a sample cell of a spectrophotometer comprising:
- a body portion having opposed limbs, said limbs including an intermediate region of reduced cross-sectional dimensions;
- and an inner-end region of substantially increased cross-sectional dimensions;
- said opposed limbs being spaced apart from each other and having a chamfered end.
Dependencies are inferred from the claim text.