Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample
Patent
1988-06-02
1990-10-09
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing gas sample
422 56, 422 57, 422 58, 422101, 436109, 55270, 55318, 55387, 55487, 7386321, 7386323, G01N 124, B01D 5330
Patent
active
049619160
ABSTRACT:
The invention relates to an improved sampling device for selectively collecting gaseous and aerosol pollutants contained in polluted air, said device being of the type comprising a cartridge provided with an inlet, an outlet and filtering means, a vacuum pump and means for connecting said pump to the outlet of the cartridge to cause some pulluted air to be drawn through said filtering means, the improvement wherein said filtering means consists of three successive filters and wherein: the first filter is made with a material of such a porosity that it collects aersol pollutants but is permeable to gas; the second filter is positioned downstream of the first filter and consists of a porous substrate impregnated with an effective amount of a chemical compound that reacts with one or more specific harmful or toxic gaseous pollutants to produce therefrom derivatives, said second filter being of such a porosity as to be permeable to air but not to said derivatives; and the third filter is positioned downstream of the second filter and consists of a porous material that is permeable to air and rigid enough to prevent deformation of the first and second filters. The invention also relates to a method using the above mentioned device.
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Lesage Jacques
Perrault Guy
Griffith Rebekah A.
IRSST-Institut de Recherche en Sante et en Securite du Travail d
Warden Robert J.
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