Vessel having intersample anticontamination construction

Abstract

Abstract A vessel particularly constructed to separate each of a sequence of liquids, such that each liquid is free of intersample contamination by a prior liquid. Such contamination, which could be caused by residue of the prior liquid adhering to the walls of the vessel, particularly near its drain, or because of inadvertent liquid or gas bubble backflow from the drain, is obviated by an isolation chamber interposed between a primary chamber of the vessel and its drain. A necked passageway or surface of connection between the two chambers is of such proportions that pressure differentials and surface tension hold a major portion of the fluid in the primary chamber and create a gas barrier between the two chambers. A preferred embodiment of the improved vessel is useful as a cuvette in making hemoglobin determinations and includes a housing having an integral overflow reservoir, drain, and receptacles for radiant energy transmitting and receiving apparatus.

Inventors

• 👤 Wallace H Coulter

Bibliographic Details