G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 33/98 (2006.01) G01N 21/78 (2006.01) G01N 31/22 (2006.01) G01N 33/52 (2006.01)
Patent
CA 2097475
A reagent, an apparatus and a method for semi-quantitatively estimating the concentration of readily oxidizable organic vapors in a gas sample, as for example ethanol in a human breath sample, is disclosed. The ethanol-sensitive solid indicator is a solid support which contains a permanganate salt and is wetted by a strongly acidic or alkaline solution. In the presence of ethanol the indicator produces a clearly visible color change. The apparatus contains the indicator and provides a pathway for a gas sample through the indicator. The method allows estimation of the organic-vapor content of a gas sample by comparing the volume of indicator which changes color in response to the gas sample with the volume which changes color in response to a known-concentration standard.
Gowling Lafleur Henderson Llp
Supelco Inc.
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