Heterogeneous membrane electrodes

G - Physics – 01 – N

Patent

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Details

G01N 27/30 (2006.01) G01N 27/40 (2006.01) G01N 27/401 (2006.01) G01N 27/416 (2006.01)

Patent

CA 2594371

The present invention relates to planar electrochemical sensors with membrane coatings used to perform chemical analyses. The object of this invention is to provide unit-use disposable sensors of very simple and inexpensive construction, preferably with only a single membrane coating on an electrode. The invented devices are potentiometric salt-bridge reference electrodes and dissolved gas sensors constructed with a heterogeneous membrane coating of a conductor. The heterogeneous membrane, which is an intimate admixture of a hydrophobic and a hydrophilic compartment, concurrently supports constrained transport of non-volatile species through its hydrophilic compartment and rapid gas and water vapor transport through its hydrophobic compartment.

La présente invention porte sur des capteurs électrochimiques planaires avec des revêtements de membrane servant à réaliser des analyses chimiques. L~objet de la présente invention est de prévoir des capteurs à usage unitaire et unique de construction très simple et bon marché, de préférence avec seulement un revêtement à une seule membrane sur une électrode. Les dispositifs de l~invention sont des électrodes de référence à pont de sel potentiométriques et des capteurs à gaz dissout construits avec un revêtement de membrane hétérogène pour conducteur. La membrane hétérogène, constituant un mélange intime d~un compartiment hydrophobe et d~un compartiment hydrophile, supporte simultanément le transport contraint d~espèces non volatiles à travers son compartiment hydrophile et le transport rapide de gaz et de vapeur d~eau à travers son compartiment hydrophobe.

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