Abstract: The invention relates to a cuvette rotor having at least one radially extending cuvette with a first chamber, a second chamber and a third chamber, the first chamber being located at a central location on the rotor, the third chamber being located at a peripheral location on the rotor, and the second chamber being located between the first and third chambers. The cuvette is defined by a top wall, a bottom wall, and side walls. A first barrier defines a boundary between the first and second chambers, and a second barrier defines a boundary between the second and third chambers. First, second and third ports are disposed in the top wall of the cuvette above the first, second and third chambers, respectively, and a first deflector is disposed between the first and second ports and connected to the top wall of the cuvette. Similarly, a second deflector is disposed between the second and third ports and is connected to the top wall of the cuvette.

Abstract: Apparatus for collecting test samples including a support plate and a plurality of integrally connected vessels, which are supported by the support plate. The support plate includes an upper surface having a predetermined number of recesses aligned in at least one row. The internal dimensional configuration of one of the recesses in each of the rows is different from the configuration characteristic of the remainder of the recesses in the row. The recess with the different internal dimensional configuration is asymmetrically disposed along each of the rows. The vessels from at least one line and the number of vessels in each line is equivalent to the predetermined number of recesses in one of the rows. The base of the vessels has a shape corresponding to the internal dimensional configuration of an opposing recess, such that the base of one of the vessels in each line is different from the remainder of vessels in the same line.