Abstract: A multicuvette rotor for use in a centrifugal analyzer defines a circumferential array of elongated radially extending cuvettes and includes a one-piece body member of molded transparent material that has a planar upper surface and that defines a circumferential array of elongated cuvette recesses, and a one-piece cover member of molded transparent material that has a planar lower surface parallel to the planar upper surface of the body member with a continuous seal extending around each cuvette recess between the planar upper and lower surfaces to define the circumferential array of analytical cuvettes.

Abstract: A multicuvette rotor for use in a centrifugal analyzer includes a one piece body member of molded transparent material that defines a circumferential array of elongated cuvette recesses and a one piece cover member of molded transparent material, the cover and body member being bonded together to define a circumferential array of individually sealed separate analytical cuvettes. An annular recess in the cover member adjacent the periphery thereof has a planar optical finish base surface.

Abstract: An improved analytical cuvette assembly includes structure defining a first chamber region that has a loading port through which a first reaction component is introduced for storage, structure defining a second chamber region having a loading port through which a second reaction component is introduced for storage, and barrier structure between the first and second chamber regions that has a crest portion that defines the lower edge of a transfer passage between the two chamber regions. The second chamber region includes an analysis region where the reaction product resulting from mixture of the two reaction components is subjected to analysis.