G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/03 (2006.01) G01N 35/02 (2006.01)
Patent
CA 2140373
A cell for performing optical measurements in an automatic analyzer is molded in one piece from a transparent plastic material, and has a tubular body including two plane walls parallel to each other, two opposite ends, and a bottom wall. The first end of the tubular body is open and the second end is closed by the bottom wall which has the shape of a half-cylinder. The tubular body of the cell has two side-walls which extend between the plane-parallel walls and which each have an upper portion and a lower portion. The lower portion of each side wall is adjacent the bottom wall and includes an elongated, leg-shaped outer projection which extends along the longitudinal axis of the cell between the upper portion of the side-wall and a point at a certain distance from the bottom wall. Each of the plane-parallel walls has a tongue member adjacent the open end of the tubular body. The tongue members extend outwardly from the border of the open end of the tubular body of the cell in a direction perpendicular to the plane-parallel wall and ends at an outer edge. Each tongue member has an upper surface and a recess, and said tongues and their recesses are positioned symmetrically to each other with respect to the longitudinal axis of the cell. To obtain improve optical properties of the cuvette side walls and bottom wall (used as measuring windows for carrying out electro-optical measurements of the cuvette contents), the leg shaped outer projection on the side-wall containing the injection point of the cuvette is longer and broader than the leg shaped outer projection on the opposite side-wall.
F. Hoffmann-La Roche Ag
Gowling Lafleur Henderson Llp
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