Reading devices for teststrips

Details Reading devices for teststrips Reading devices for teststrips

G - Physics

01

N

G01N 21/78 (2006.01) B01L 3/00 (2006.01) G01N 21/86 (2006.01) G01N 33/483 (2006.01) G01N 33/52 (2006.01) G01N 37/00 (2006.01)

Patent

CA 2173965

A method of "reading" the result of an assay effected by concentrating a detectable material in a comparatively small zone of a carrier in the form of a strip, sheet or layer through the thickness of which electromagnetic radiation such as visible light is transmissible, wherein at least a portion of one face of the car- rier is exposed to incident electromag- netic radiation which is substantially uni- form across the entire portion, the por- tion including the small zone, and elec- tromagnetic radiation emerging from the opposite face of the carrier is measured to determine the assay result. Preferably the radiation is diffuse light.

L'invention concerne un procédé de "lecture" du résultat d'un dosage effectué en concentrant un matériau pouvant être détecté, dans une zone relativement petite d'un support ayant la forme d'une bande, d'une couche ou d'une feuille, et à travers l'épaisseur duquel un rayonnement électromagnétique tel que de la lumière visible est transmissible. Selon ce procédé, au moins une partie d'une face du support est exposée au rayonnement électromagnétique incident qui est sensiblement uniforme sur la totalité de la partie, cette partie comprenant la petite zone. Le rayonnement électromagnétique émergeant de la face opposée du support est mesuré pour déterminer le résultat du dosage. De préférence, le rayonnement est de la lumière diffuse.

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