Immunoassay with extended dynamic range

G - Physics – 01 – N

Patent

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G01N 33/543 (2006.01)

Patent

CA 2600911

The present invention provides a method of performing a competitive assay for the detection and quantification of an analyte over an extended dynamic range. This is achieved by a multi-step sample addition method whereby different concentrations of sample are added at different times during the assay that produces a dose-response curve with multiple windows of detection. This multi- step sample addition method causes the dose-response curve of the composite assay to broaden, dramatically increasing the assay dynamic range.

L'invention concerne une méthode permettant de réaliser un dosage compétitif pour la détection et la quantification d'un analyte sur une plage dynamique étendue. A cet effet, une méthode d'addition d'échantillons en plusieurs étapes est employée qui consiste à ajouter différentes concentrations d'un échantillon à différents moments pendant le dosage qui produit une courbe dose-réponse avec plusieurs fenêtres de détection. Cette méthode d'addition d'échantillons en plusieurs étapes permet d'élargir la courbe dose-réponse du dosage composite, ce qui a pour effet d'augmenter de façon remarquable la plage dynamique du dosage.

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