Measuring the concentration of a substance

Details Measuring the concentration of a substance Measuring the concentration of a substance

G - Physics

01

N

G01N 21/77 (2006.01) G01N 21/64 (2006.01) G06F 17/11 (2006.01) A61B 5/00 (2006.01) A61B 6/00 (2006.01)

Patent

CA 2309089

A system for measuring the concentration of an assay substance comprising a sensor having an optical fibre (10) on one end of which is coated a body (22). A fluorophor is dispersed within the body (22), the fluorescent activity of which is altered in relationship to the concentration of the assay substance. Light from a source such as an LED (40) is carried by the fibre (10) to the body (22). Light emitted by the fluorophor is carried to a detector unit (54) along the fibre (10). Concentration of the assay substance is determined by measurement of the characteristics of the growth in emitted light following activation of the LED (40).

L'invention concerne un système de mesure de la concentration d'une substance de dosage. Ce système comprend un capteur présentant une fibre optique (10) sur une extrémité de laquelle est enduit un corps (22). Un fluorophore est dispersé dans le corps (22), l'activité fluorescente du fluorophore est modifiée par rapport à la concentration de la substance de dosage. La lumière d'une source, telle qu'une diode électroluminescente (40) est transportée par la fibre (10) vers le corps (22). La lumière émise par le fluorophore est transportée par une unité de détection (54) le long de la fibre (10). La concentration d'une substance de dosage est déterminée par la mesure des caractéristiques de croissance dans la lumière émise après l'activation de la diode électroluminescente (40).

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