Abstract: A sealable container for holding an analytical sample for processing is disclosed. The container includes a body with a dispensing port and an insert member with an outlet port slidably received in the body. The insert member and the body are movable relative to each other between a first position, in which the outlet port is substantially aligned with the dispensing port, and a second position, in which the outlet port is substantially out of alignment with the dispensing port. Sealing between the insert member and the body, which may take the form of O-rings, provide a substantially airtight, hermetic seal between a reaction chamber formed in the insert member and the body so that the reaction chamber can be sealed or isolated from the outside environment. The container is particularly adapted to contain the processes of nucleic acid amplification and to thereby reduce the problems of sample cross-contamination encountered in such processes.

Abstract: Aqueous solutions containing buffers and electrolytes are adjusted to levels required for calibration of both blood gas analyzers and ion selective electrolyte analyzers. A control material, composed of similar matrix, is adjusted to three levels of blood gas and electrolyte conditions. These quality control materials are used to monitor blood gas/electrolyte laboratory instrumentation.

Abstract: The present invention provides a waste removal assembly used in conjunction with a sampling system which provides access to a sealed container. The assembly includes a lifting mechanism which moves a sample container against a hollow cleaning needle. The needle penetrates the stopper of the container, and its penetrating end moves into the container proximate the inside surface of the stopper. The assembly also includes a pump and tube arrangement in communication with the needle for removing or displacing entrapped serum or other debris from the bottom surface of the stopper and placing it in a waste container. After removing the debris from the container, the cleaning assembly vents the cleaned container to atmospheric pressure, and the sampling system performs sampling operations through a puncture tube which defines a temporary opening in the stopper of the container.