Device for trapping and assaying carbon dioxide and method...

G - Physics – 01 – N

Patent

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G01N 33/497 (2006.01) G01N 31/22 (2006.01) G01N 33/00 (2006.01)

Patent

CA 2273207

A device for use in trapping and assaying 14Co2 in air exhaled by a person to which a 14C labelled compound has been administered, in particular 14C labelled urea, comprises first and second substantially flat oblong duct forming elements joined to each other at their edges except for one of their short edges and forming a duct between them. The first duct forming element includes a gas permeable matrix element for absorption of CO2. The device is provided with indicator means for visual detection of CO2 absorption and a film element of low .beta.-radiation absorptivity interposed or interposable between the matrix element and a .beta.-radiation measuring instrument. Also disclosed is a corresponding method.

Dispositif servant à capturer et doser le <14>CO2 dans l'air exhalé par une personne à laquelle on a administré un composé marqué au <14>C, en particulier de l'urée marquée au <14>C. Le dispositif comporte un premier et un second élément oblong sensiblement plat, réunis l'un à l'autre par leurs bords, à l'exception du bord d'un des petits côtés, de manière à former un conduit entre les deux. Le premier élément du conduit comporte un élément matrice perméable au gaz pour l'absorption du CO2. Le dispositif possède des moyens indicateurs permettant une détection visuelle d'absorption de CO2, et un élément film à faible pouvoir d'absorption du rayonnement beta , interposé ou interposable entre l'élément matrice et un instrument de mesure du rayonnement beta . L'invention porte en outre sur un procédé d'utilisation du dispositif.

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