METHOD AND CELL FOR MEASURING THE GLOBAL ION CONCENTRATION OF A BODY FLUID
First Claim
1. A method for measuring the global ion concentration of a body fluid comprising the following steps:
- application of a stable DC voltage between first and second electrodes of a cell for measuring the global ion concentration of a body fluid so as to cause electrochemical hydrolysis reactions of the body fluid water to occur at the level of said first and second electrodes,measurement of a hydrolysis current generated by said electrochemical hydrolysis reactions of water and,determination of the global ion concentration of the body fluid by comparison with a previously defined calibration curve,said measuring cell comprising a fluid channel arranging at least one passage enabling the body fluid to flow from an inlet to an outlet, said fluid channel having an internal cross-section less than or equal to 1.5 mm between the first and second electrodes arranged on said passage, so that the ion concentration of the body fluid is the factor limiting the kinetics of said electrochemical hydrolysis reactions of the water.
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Abstract
Method for measuring the global ion concentration of a body fluid that comprises application of a stable DC voltage between first and second electrodes of a cell for measuring the global ion concentration of a body fluid so as to cause electrochemical hydrolysis reactions of the body fluid water to occur at the level of said first and second electrodes, measurement of a hydrolysis current generated by said electrochemical hydrolysis reactions of the water and determination of the global ion concentration of the body fluid by comparison with a previously defined calibration curve. The measuring cell comprises a fluid channel having an internal cross-section smaller than or equal to 1.5 mm.
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Citations
17 Claims
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1. A method for measuring the global ion concentration of a body fluid comprising the following steps:
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application of a stable DC voltage between first and second electrodes of a cell for measuring the global ion concentration of a body fluid so as to cause electrochemical hydrolysis reactions of the body fluid water to occur at the level of said first and second electrodes, measurement of a hydrolysis current generated by said electrochemical hydrolysis reactions of water and, determination of the global ion concentration of the body fluid by comparison with a previously defined calibration curve, said measuring cell comprising a fluid channel arranging at least one passage enabling the body fluid to flow from an inlet to an outlet, said fluid channel having an internal cross-section less than or equal to 1.5 mm between the first and second electrodes arranged on said passage, so that the ion concentration of the body fluid is the factor limiting the kinetics of said electrochemical hydrolysis reactions of the water. - View Dependent Claims (2, 3, 4, 5, 17)
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6. A cell for measuring the global ion concentration of a body fluid which comprises:
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a fluid channel with an inlet and an outlet of the body fluid, and first and second electrodes connected to a stable DC voltage generator and to an electronic measurement circuit, said fluid channel comprising first and second zones each having a defined internal cross-section and a third zone situated between the first zone and the second zone and adjacent to said first and second zones and arranging at least one passage for the body fluid, said third zone having a reduced internal cross-section, smaller than the respective internal cross-sections of said first and second zones, to limit ionic migration between said electrodes in the body fluid, said first and second electrodes being arranged on said passage and being respectively situated at the level of the first and second zones. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification