Dry analytical element

Details Dry analytical element Dry analytical element

1996-04-08

1999-08-10

Alexander, Lyle A.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

422 66, 436 46, 436169, G01N 3348

Patent

active

059355204

ABSTRACT:
A dry analytical substantially flat film chip for use as an analytical element composed of a support, at least one reagent layer and a spreading layer laminated in this order. The chip is suitable for use as is as an analytical element for liquid samples. The chip further has means for restraining a liquid sample applied to its surface from spreading beyond a predetermined area of the surface. The restraining means may be a fused nonporous area of the spreading layer or may be a portion or area of the spreading layer which has been clogged with a hydrophobic or lipophilic material to render it nonporous. The inventive film chip, in addition, provides means for preventing fraying of the edges of the porous spreading layer as well as the prevention of the generation of fiber dust during cutting of the chip.

REFERENCES:
patent: 2129754 (1938-09-01), Yagoda
patent: 2785057 (1957-03-01), Schwab et al.
patent: 3992158 (1976-11-01), Przybylowicz et al.
patent: 4477575 (1984-10-01), Vogel et al.
patent: 4647430 (1987-03-01), Zweig
patent: 4776904 (1988-10-01), Charlton et al.
patent: 5209904 (1993-05-01), Forney et al.

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