Low volume electrochemical sensor

Details Low volume electrochemical sensor Low volume electrochemical sensor

G - Physics

01

N

G01N 33/49 (2006.01) G01N 27/403 (2006.01)

Patent

CA 2302448

An electrochemical sensor electrode strip that measures analyte concentration in an aqueous sample as small as 2.5 to 2.0 µL is described. Reduction in the minimum sample size is achieved by means of a dielectric coating impregnated into peripheral regions of one or more hydrophilic mesh layers, thereby reducing sample dead volume. The mesh layers are located between an electrode support and a cover layer, which cover layer includes an aperture located upstream from an electrode arrangement.

Cette invention a trait à une bande électrode de capteur électrochimique destiné à la mesure d'une concentration d'analysat dans un échantillon aqueux de volume très réduit, de l'ordre de 2,5 à 2,0 mu L. On arrive à réduire au minimum le volume de l'échantillon en utilisant un revêtement diélectrique porteur, au niveau des régions périphériques, d'une ou de plusieurs couches treillis hydrophiles, ce qui diminue le volume mort d'échantillon. Ces couches treillis se trouvent entre un support d'électrode et une couche de couverture, une ouverture située en amont du dispositif électrode étant ménagée dans la couche de couverture.

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