Measuring and testing – Gas content of a liquid or a solid
Patent
1998-07-20
1999-11-30
Brock, Michael
Measuring and testing
Gas content of a liquid or a solid
7386474, 7386443, G01N 3324, G01N 124
Patent
active
059922133
ABSTRACT:
A method for locally testing soil contamination by determining the generation rate of a contaminant fluid in porous soil, including the steps of injecting a purging fluid in the soil through a probe while simultaneously collecting fluid samples in the ground with the probe and measuring therein the contaminant concentrations, until an equilibrium is reached, i.e. until there is no variation of the contaminant fluid concentration. Afterwards, a tracer gas such as oxygen is continuously injected into the soil through the probe at a known flow rate in addition to the purging fluid, and in a small quantity relative to the second fluid, while fluid samples are collected wherein the tracer gas concentrations are measured. With the above-mentioned measured concentrations of the contaminant fluid and the tracer gas, the generation rate by the soil of the contaminant fluid may be computed.
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patent: 5786527 (1998-07-01), Tartre
Brock Michael
Martineau Fran.cedilla.ois
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