Devices for use in chemical test procedures
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United States of America Patent
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Mar 9, 1993
Grant Date -
N/A
app pub date -
Dec 13, 1990
filing date -
May 18, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a device for use in methods of assay, for example those involving fluorescent moieties. The device possesses a cavity or cavities into which the sample liquid may be drawn by capillary action. Each cavity is formed from two transparent solid plates (35,36): one (36) is adapted to act as a waveguide and carries a suitable immobilized reagent on its surface within the cavity; the other (35) carries on its external surface and optionally also on part only of its internal surface a layer of light-absorbing material (37). The invention also relates to a method of manufacturing devices according to the invention, and to a method of assaying for a ligand in a sample using a device according to the invention.
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