G - Physics – 01 – N
Patent
G - Physics
01
N
73/104, 150/21
G01N 30/00 (2006.01) G01N 1/22 (2006.01)
Patent
CA 1169747
ABSTRACT OF THE DISCLOSURE A personal dosimeter for collecting a quantity of a gaseous contaminant in proportion to its average ambient concentration over the time of collection is provided. The dosimeter consists essentially of a closed receptacle containing a gas-collection medium, a channel-containing diffusion device forming a part of the boundary of the receptacle and a porous, hydrophobic film in contact with the interior side of the barrier.
379830
E. I. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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