G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 7/04 (2006.01)
Patent
CA 2266567
A method and apparatus for the measurement of a specific dissolved gas in a liquid. The apparatus comprises a gas-permeable membrane for separation of dissolved gas from the liquid; a gas collecting chamber communicating with and disposed on the side of said membrane remote from the liquid for collecting dissolved gas separated from the liquid; a second chamber for receiving a gas absorbing or adsorbing material for the specific dissolved gas; means for interconnecting the second chamber to one gas collecting chamber to allow contact of the dissolved gas with the gas absorbing or adsorbing material; and pressure measuring means for providing a measurement of the difference of pressure of the gas resulting from the absorption or adsorption of the specific selected gas, thereby providing a measure of the quantity of the selected specific gas present in the liquid. The method involves interfacing the liquid to be measured with a gas-permeable membrane to allow permeation and separation of dissolved gas from the liquid, and confining separated gas to a chamber; establishing equilibrated pressure of the separated gas within the chamber representative of the sum of partial pressures of all dissolved gases; contacting the gas with a material that absorbs or adsorbs the specific selected gas to be measured, and determining the pressure reduction resulting from the absorption or adsorption of the specific selected gas, to provide a measure of the specific selected gas present in the liquid.
Farmer David M.
Johnson Bruce D.
Mcneil Craig L.
As Represented By The Ministe R. Of Fisheries And Oceans Her Majesty The Queen In Right Of Canada
Bitner Ronald G.
Farmer David M.
Johnson Bruce D.
Mcneil Craig L.
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