Method and device for detecting fumigants in air samples

Details Method and device for detecting fumigants in air samples Method and device for detecting fumigants in air samples

G - Physics

01

N

G01N 33/00 (2006.01) G01N 27/00 (2006.01) G01N 29/02 (2006.01) G01N 29/036 (2006.01) G01N 33/24 (2006.01)

Patent

CA 2439483

The invention relates to a method and to a device for detecting fumigants in air samples. The devices can for example be configured as a portable analyzer (10) that has a sound (11) for taking air samples from the soil. Detection means (16) generate electrical signals upon contact with the air sample, said signals being generated in accordance with the concentration of the fumigants to be detected in the air sample. The detection means (16) according to the invention comprise a mass-sensitive sensor, for example an array of quartz microbalances with suitable selective surface layers.

L'invention concerne un procédé et un dispositif pour détecter la présence de fumigènes dans des échantillons d'air. Le dispositif peut, par exemple, être constitué d'un appareil d'analyse portable (10) comportant une sonde (11) pour prélever des échantillons d'air dans le sol. Des moyens de détection (16) génèrent des signaux électriques au contact d'un échantillon d'air, ces signaux dépendant de la concentration des fumigènes à détecter dans l'échantillon. Selon l'invention, ces moyens de détection (16) comprennent au moins un capteur sensible à la masse, par exemple une batterie de balances à cristal, dotées de couches superficielles sélectives appropriées.

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