Improved capacity chemical suppressors and method of use

B - Operations – Transporting – 01 – D

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B01D 15/08 (2006.01) B01D 15/36 (2006.01) B01D 61/24 (2006.01) G01N 30/96 (2006.01)

Patent

CA 2514844

A non-electrolytic method and apparatus for treating an aqueous sample stream including analyte ions and matrix ions of opposite charge, for pretreatment or suppression. The apparatus includes an ion exchange membrane capable of passing only ions of opposite charge to the analyte ions, a sample stream flow channel, a first aqueous stream ion receiving flow channel adjacent one side of the sample stream flow channel and separated therefrom by the first ion exchange membrane, and stationary flow-through ion exchange packing disposed in the sample stream flow channel. The ion receiving channel has an ion exchange capacity for the matrix ions less than about 25% of the ion exchange capacity for the matrix ions.

L'invention concerne une méthode et un appareil non électrolytiques qui permettent de traiter un courant d'échantillonnage aqueux contenant des ions d'analyte et des ions de matrice à charge opposée à des fins de pré-traitement ou de suppression. Cet appareil comprend une membrane d'échange ionique capable de passer uniquement les ions de charge opposée vers les ions d'analyte, un canal pour le courant d'échantillonnage aqueux, un premier canal d'écoulement recevant les ions du courant d'échantillonnage aqueux à proximité d'un côté du canal pour le courant d'échantillonnage aqueux et séparé de ce dernier par la première membrane d'échange ionique, enfin un remplissage d'échange ionique à flux fixe disposé dans le canal pour le courant d'échantillonnage aqueux. Le canal récepteur d'ions possède une capacité d'échange ionique, concernant les ions de matrice, qui est inférieure à environ 25 % de la capacité d'échange ionique pour ce qui est des ions de matrice.

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