Isolation liquid layer retention device

Details Isolation liquid layer retention device Isolation liquid layer retention device

B - Operations, Transporting

01

L

150/24

B01L 3/00 (2006.01) B01L 99/00 (2010.01) B01J 19/16 (2006.01) G01N 1/00 (2006.01) G01N 1/10 (2006.01) G01N 35/00 (2006.01)

Patent

CA 1300474

ABSTRACT OF THE DISCLOSURE 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. 2604A

535417

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