Electrodes and their use in analysis

Details Electrodes and their use in analysis Electrodes and their use in analysis

G - Physics

01

N

G01N 27/26 (2006.01) C12Q 1/00 (2006.01) C12Q 1/54 (2006.01)

Patent

CA 2196380

A method for indicating the concentration of a substance in solution comprises passing an alternating voltage between a first electrode structure having coated thereon a polymer and a second separate counter electrode in the solution. The polymer is in one of an oxidised and a reduced state, between which states its conductivity varies. Changes in the conductivity of the polymer coating are measured, the measurement being representative of the state of the polymer and thereby of the concentration of the substance in the solution. Electrodes for use in this method are also described.

Procédé servant à indiquer la concentration d'une substance en solution et consistant à faire passer une tension alternative entre une première structure d'électrode revêtue d'un polymère et une deuxième contre-électrode séparée dans la solution. Le polymère se trouve soit en état oxydé, soit en état réduit et sa conductivité varie entre lesdits états. On mesure les variations de la conductivité du revêtement polymère, cette mesure représentant l'état du polymère et, par conséquent, la concentration de la substance dans la solution. L'invention concerne également les électrodes de mise en application du procédé.

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