G - Physics – 01 – N
Patent
G - Physics
01
N
324/23
G01N 33/50 (2006.01) G01N 27/30 (2006.01) G01N 27/49 (2006.01)
Patent
CA 1127240
ABSTRACT OF THE DISCLOSURE A method for determining the concentration of sugar in the presence of interfering foreign substances, particularly for determining glucose in a body fluid, by means of an electro- catalytic sugar sensor which has a measuring electrode in which the measuring electrode is alternatingly set potentiostatically to a reactivation and a measuring potential and the current flow- ing during the measuring period is evaluated as the measurement signal. To prevent foreign substances from exerting an interfer- ing influence and thereby permit a sensitive sugar determination which is reliable over an extended period of time, a hydrophilic diaphragm is arranged in front of the measuring electrode to impede the resupply of the interfering foreign substances to the measuring electrode so that a diffusion limit current adjusts itself during the reactivation phase in the oxidation of the foreign substances; and the current is evaluated with a time delay relative to the start of the measuring period.
325908
Gebhardt Ulrich
Luft Gunter
Richter Gerhard
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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