Techniques for analyzing products containing a coloring agent

G - Physics – 01 – N

Patent

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G01N 31/02 (2006.01) G01N 33/02 (2006.01) G01N 33/14 (2006.01) G01N 37/00 (2006.01)

Patent

CA 2503199

A method is provided for detecting a tracer in a preparation by precipitating a coloring agent from a sample of the preparation, especially where the coloring agent otherwise interferes with detection of the tracer. A sample of the preparation may be contacted with an effective amount of a precipitating agent to precipitate the coloring agent in the sample, yielding a sample supernatant having a reduced concentration of coloring agent compared to the preparation. Detection of the tracer in the supernatant may produce a result which may be evaluated to assist in quality validation in a process of manufacturing the preparation or authenticating the preparation.

L'invention concerne un procédé permettant de détecter un indicateur traceur dans une préparation par précipitation d'un colorant à partir d'un échantillon de ladite préparation, notamment lorsque ledit colorant perturbe la détection de l'indicateur traceur. On peut mettre en contact un échantillon de la préparation avec une dose efficace d'un agent précipitant afin de précipiter le colorant dans l'échantillon, ce qui produit un surnageant d'échantillon dont la concentration de colorant est réduite par rapport à la préparation. La détection de l'indicateur traceur dans le surnageant peut produire un résultat qui peut être évalué afin de contribuer à la validation de qualité dans un processus de fabrication de ladite préparation ou de son authentification.

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