Method and device for detecting temperature-dependent...

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G01N 21/64 (2006.01) C12Q 1/68 (2006.01) G01N 21/76 (2006.01) G01N 33/543 (2006.01) G01N 33/58 (2006.01) G01N 33/68 (2006.01)

Patent

CA 2398078

The invention relates to a method and a device for detecting temperature- dependent parameters, such as the association/dissociation parameters and/or the equilibrium constant of complexes that comprise at least two components. The first components which are situated in a liquid phase are connected to measuring points, preferably on a planar optical waveguide of a reaction carrier, produced by second components that are coupled to the solid reaction carrier and specifically bind to the first components, by means of a, preferably heatable, device for contacting the liquid phase and the reaction carrier, whereby complexes are produced. Fluorescent dyes which are bound to the first components and/or second components are excited in the surface area of the planar optical waveguide, preferably by means of the evanescent field of the excitation light that is coupled into the planar optical waveguide, for emitting fluorescence light. The emitted fluorescence light is detected in the area of the optical waveguide or by means of excitation light emanating from the area of the optical waveguide. Production or dissociation of the complexes comprising first components and second components is observed as a temperature function.

L'invention concerne un procédé et un dispositif pour la détection de paramètres dépendant de la température, tels que les paramètres d'association/dissociation et/ou la constante d'équilibre de complexes constitués d'au moins deux composants. Les premiers composants, qui sont dans une phase liquide, sont reliés à des points de mesure, de préférence se trouvant sur un guide d'ondes optiques planaire d'un support de réaction, formés par des seconds composants couplés au support de réaction solide et se liant spécifiquement aux premiers composants, au moyen d'un dispositif, pouvant être de préférence chauffé, servant à la mise en contact de la phase liquide et du support de réaction, ce qui entraîne la formation de complexes. L'excitation des colorants fluorescents qui sont fixés aux premiers composants et/ou seconds composants se fait dans la zone de la surface du guide d'ondes optiques planaire, de préférence au moyen du champ évanescent de la lumière d'excitation qui est injectée dans le guide d'ondes optiques planaire. La détection de la lumière de fluorescence émise se fait dans l'environnement du guide d'ondes optiques ou au moyen de la lumière d'excitation partant de cet environnement. La formation ou la décomposition des complexes comprenant des premiers composants et des seconds composants sont observées en fonction de la température.

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