Abstract: In the cuvette rotor (20) having circularly arranged and radially extending individual cuvettes (10) which are closed on all sides, each of the cuvettes (10) has two chambers (1, 2) which are separated from one another by a barrier (11). Each chamber (1, 2) is provided with an orifice (3, 4) for filling. Vessels (9) which are closed on all sides are arranged between the individual cuvettes (10), the bottom part (15) of each vessel having a barrier (13) which divides the vessel into two chambers (5, 6), and the upper part (14) being provided with an orifice (22) in the area of the chamber (5) arranged close to the axis of rotation and with a guard (12), which protrudes into the peripherally arranged chamber (6), in the area of the peripherally arranged chamber (6).

Abstract: In this cell arrangement for optical investigations, the individual cells (1) are arranged in strips. They are held at different spacings from one another by connecting elements (2,5,12). The cell holder (9) associated therewith is provided with cell wells (11), which are disposed in a row and the spacings of which correspond to those of the cells.