Method for determining the concentration of sugar using an elect

Details Method for determining the concentration of sugar using an elect Method for determining the concentration of sugar using an elect

1979-04-11

1982-12-28

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

128635, 204195B, 204195P, G01N 2752

Patent

active

043660339

ABSTRACT:
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 electrocatalytic 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 flowing during the measuring period is evaluated as the measurement signal. To prevent foreign substances from exerting an interfering 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.

REFERENCES:
patent: 3305468 (1967-02-01), Liesch
patent: 3539455 (1970-11-01), Clark
patent: 3551109 (1970-12-01), Dahms
patent: 3770607 (1973-11-01), Williams
patent: 3837339 (1974-09-01), Aisenberg et al.
patent: 3979274 (1976-09-01), Newman
Gebhardt, U. et al., Biomed Technik, 22, pp. 399 and 400, (1977).
Kuo Wei Chang et al., Amer. Soc. Artif. Int. Organs, vol. 19, pp. 352-360, (1973).

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