Method for determination of product and substrate concentrations in a medium
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United States of America Patent
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app pub date -
Nov 22, 2002
filing date -
May 22, 2000
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Abandoned
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Abstract
A method for determining substrate and product concentration in liquid and/or gaseous media is disclosed. Several samples of at least one substance to be analyzed are removed in at least one sampling region by time-controlled diffusion of the analyte between the medium and a diffusion medium, which is fed to the sampling regions through fluid conduits using at least one pump and semipermeable membranes. The diffusion medium is transported to at least one detector while simultaneously new diffusion medium is fed from the sampling region, and analyzed to determine the analyte concentration. The detector provides a temporal concentration distribution or a temporal distribution of a signal proportional to the concentration. A change in the ratio of the signal maximum to the base line is ascertained in the output of the detector signal and, on the basis of this, a change in the diffusion properties of the semipermeable membrane is inferred and a correction factor ascertained.
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