Isolation liquid layer retention device

Details Isolation liquid layer retention device Isolation liquid layer retention device

1986-06-30

1987-07-07

Levy, Stewart J.

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

B01L 1100

Patent

active

046786414

ABSTRACT:
A new and improved isolation liquid layer retention device is provided, and comprises a porous member operatively associated with the interior of a container which contains a quantity of an aqueous liquid having a layer of a generally immiscible isolation liquid which is generally of greater density disposed thereon. The porous member is operable to cause the aqueous liquid to form a generally convex meniscus to strongly support the generally denser isolation liquid layer thereon to prevent the sinking of the isolation liquid into the aqueous liquid; and is operable to act as a moderating control by virtue of a "source and sink" action vis-a-vis the isolation liquid to maintain a uniform and readily reproducible configuration for the isolation liquid layer on a container-to-container basis with regard to each of a plurality of the containers. The device is particularly adapted for use with a plurality of containers of aqueous sample and reagent liquids in contemporary automated sample liquid analysis systems.

REFERENCES:
patent: 3479141 (1969-11-01), Smythe et al.
patent: 4121466 (1978-10-01), Reichler et al.
patent: 4391779 (1983-07-01), Miskinis
patent: 4515753 (1985-05-01), Smith et al.

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