Biosensor
First Claim
1. A biosensor comprising:
- an insulating base plate;
an electrode system having a measuring electrode and a counter electrode provided on said base plate;
a reaction layer comprising at least an oxidoreductase and an electron mediator;
a sample solution supply pathway including said electrode system and said reaction layer;
a sample supply unit; and
a filter provided between said sample supply unit and said sample solution supply pathway for filtering out hemocytes of a blood, wherein plasma of said blood, with said hemocytes having been filtered out by said filter, is sucked into inside of said sample solution supply pathway owing to capillary phenomena, wherein said filter has, at an upstream side thereof, a cross-sectional area larger than a cross-sectional area of an opening of said sample solution supply pathway.
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Abstract
The present invention provides a so improved biosensor that a whole blood is allowed to be an object to be measured, and that plasma of a blood, with hemocytes thereof having been filtered out, is allowed to quickly reach an electrode system. This sensor comprises: an insulating base plate; an electrode system, provided on the base plate, having a measuring electrode and a counter electrode; a reaction layer comprising at least an oxidoreductase and an electron mediator; a sample solution supply pathway including the electrode system and the reaction layer; and a sample supply unit, wherein the sensor is so structured that, between the sample supply unit and the sample solution supply pathway, there is provided a filter having a function to filter out hemocytes and having a cross-sectional area larger than an opening of the sample solution supply pathway, and that plasma of a blood with hemocytes thereof having been filtered out is sucked into inside of the sample solution supply pathway owing to capillary phenomena.
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Citations
9 Claims
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1. A biosensor comprising:
- an insulating base plate;
an electrode system having a measuring electrode and a counter electrode provided on said base plate;
a reaction layer comprising at least an oxidoreductase and an electron mediator;
a sample solution supply pathway including said electrode system and said reaction layer;
a sample supply unit; and
a filter provided between said sample supply unit and said sample solution supply pathway for filtering out hemocytes of a blood, wherein plasma of said blood, with said hemocytes having been filtered out by said filter, is sucked into inside of said sample solution supply pathway owing to capillary phenomena, wherein said filter has, at an upstream side thereof, a cross-sectional area larger than a cross-sectional area of an opening of said sample solution supply pathway. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- an insulating base plate;
Specification