pH/P.sub.CO2 P.sub.O2 electrode
First Claim
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1. An electrode device capable of simultaneously measuring pH and PCO2 comprising:
- (a) means defining a pH sensor, said pH sensor comprising a hydrogen ion and carbon dioxide gas permeable membrane in contact with a hydrogen ion responsive fluid, said fluid capable of being placed in contact with a means for measuring the voltage signal from the pH sensor;
(b) means defining a PCO2 sensor, said PCO2 sensor comprising a hydrogen ion and carbon dioxide permeable membrane having the same composition as the membrane in (a) in contact with a carbon dioxide responsive fluid, said fluid capable of being placed in contact with a means for measuring the voltage signal from the PCO2 sensor; and
(c) wherein the means defining the pH sensor and the means defining the PCO2 sensor are connected to each other.
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Abstract
A double and triple barrel electrode for the simultaneous measurement of pH and PCO2 ; and pH, PCO2 and P02 employing a membrane in conjunction with a pH fluid and fluids responsive to CO2 and O2. The responsive fluids exhibit a pH change upon a change in the concentration of the particular analyte in the responsive fluid. The liquid membrane is selectively permeable to H+ ion, and permeable to CO2 and O2 gas.
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Citations
44 Claims
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1. An electrode device capable of simultaneously measuring pH and PCO2 comprising:
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(a) means defining a pH sensor, said pH sensor comprising a hydrogen ion and carbon dioxide gas permeable membrane in contact with a hydrogen ion responsive fluid, said fluid capable of being placed in contact with a means for measuring the voltage signal from the pH sensor; (b) means defining a PCO2 sensor, said PCO2 sensor comprising a hydrogen ion and carbon dioxide permeable membrane having the same composition as the membrane in (a) in contact with a carbon dioxide responsive fluid, said fluid capable of being placed in contact with a means for measuring the voltage signal from the PCO2 sensor; and (c) wherein the means defining the pH sensor and the means defining the PCO2 sensor are connected to each other. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 42, 43)
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2. The electrode device of claim 2, wherein said hydrogen ion and carbon dioxide gas permeable membrane is a liquid membrane consisting of tri-N-dodecylamine and sodium tetraphenylborate in o-nitrophenyl octyl ether.
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19. An electrode device for simultaneously measuring pH, PCO2, and PO2 comprising:
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(a) means defining a pH sensor, said pH sensor comprising a hydrogen ion, carbon dioxide gas, and oxygen gas permeable membrane in contact with a hydrogen ion responsive fluid, said fluid capable of being placed in contact with a means for measuring the voltage signal from the pH sensor; (b) means defining a PCO2 sensor comprising a hydrogen ion, carbon dioxide gas and oxygen gas permeable membrane having the same composition as the membrane in (a) in contact with a carbon dioxide responsive fluid, said fluid capable of being placed in contact with a means for measuring the voltage signal from the PCO2 sensor; (c) means defining a PO2 sensor, said PO2 sensor comprising a hydrogen ion, carbon dioxide gas, and oxygen gas permeable membrane having the same composition as the membranes in (a) and (b) in contact with an oxygen responsive fluid, said fluid capable of being placed in contact with a means for measuring the voltage signal from the PO2 sensor; and (d) wherein the means defining the pH sensor, the means defining the PCO2 sensor, and the means defining the PO2 sensor are connected to each other. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 44)
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Specification