HETEROGENEOUS MEMBRANE ELECTRODES
First Claim
1. A heterogeneous membrane for an electrochemical sensing electrode for direct exposure to a sample, the membrane comprisinga number of first hydrophobic, gas permeable compartments;
- anda number of second hydrophilic electrolyte salt permeable compartments, wherein the first and second compartments are intimately admixed to form interpenetrating networks of hydrophobic and hydrophilic compartments.
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Accused Products
Abstract
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.
97 Citations
22 Claims
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1. A heterogeneous membrane for an electrochemical sensing electrode for direct exposure to a sample, the membrane comprising
a number of first hydrophobic, gas permeable compartments; - and
a number of second hydrophilic electrolyte salt permeable compartments, wherein the first and second compartments are intimately admixed to form interpenetrating networks of hydrophobic and hydrophilic compartments. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification