Solution quantitative analysis apparatus, quantitative analysis methods, and nuclear reactor water quality control system
First Claim
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1. A solution quantitative analysis apparatus comprising:
- an electrolytic cell for electrolyzing a solution containing a plurality of chemical species to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode;
means for producing a plurality of mutually different voltage-time waveform signals corresponding to a plurality of mutually different voltammetry modes equal in number to the plurality of chemical species to be analyzed;
means for separately applying the plurality of voltage-time waveform signals to the working electrode, thereby performing the plurality of voltammetry modes, wherein each of the plurality of voltage-time waveform signals electrolyzes the solution, thereby producing a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding voltammetry mode;
means for measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the plurality of voltage-time waveform signals; and
means for calculating respective concentrations of the plurality of chemical species to be analyzed on the basis of the measured ones of a limiting current and a peak current.
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Abstract
This invention comprises electrochemical analytical devices capable of performing electrolysis in multiple pulse modes. It relates to a method of quantitative analysis and equipment for performing quantitative analysis which uses a combination of these pulse modes to realize the measurement of concentrations of multiple substances to be measured, occurring in the test solution to be measured and also a nuclear reactor water quality control system employing such a quantitative analysis method.
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Citations
20 Claims
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1. A solution quantitative analysis apparatus comprising:
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an electrolytic cell for electrolyzing a solution containing a plurality of chemical species to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode; means for producing a plurality of mutually different voltage-time waveform signals corresponding to a plurality of mutually different voltammetry modes equal in number to the plurality of chemical species to be analyzed; means for separately applying the plurality of voltage-time waveform signals to the working electrode, thereby performing the plurality of voltammetry modes, wherein each of the plurality of voltage-time waveform signals electrolyzes the solution, thereby producing a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding voltammetry mode; means for measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the plurality of voltage-time waveform signals; and means for calculating respective concentrations of the plurality of chemical species to be analyzed on the basis of the measured ones of a limiting current and a peak current.
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2. A quantitative analysis apparatus for simultaneous analysis of H2 O2 and one of H2 and O2 comprising:
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an electrolytic cell for electrolyzing a solution containing H2 O2 and one of H2 and O2 to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode; means for producing two mutually different voltage-time waveform signals corresponding to two mutually different voltammetry modes equal in number to the H2 O2 and one of H2 and O2 to be analyzed; means for separately applying the two voltage-time waveform signals to the working electrode, thereby performing the two voltammetry modes, wherein each of the two voltage-time waveform signals electrolyzes the solution, thereby producing a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding voltammetry mode; means for measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the two voltage-time waveform signals; and means for calculating respective concentrations of the H2 O2 and one of H2 and O2 to be analyzed on the basis of the measured ones of a limiting current and a peak current.
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3. A quantitative analysis apparatus for simultaneous analysis of H2, O2, and H2 O2 comprising:
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an electrolytic cell for electrolyzing a solution containing H2, O2, and H2 O2 to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode; means for producing three mutually different voltage-time waveform signals corresponding to three mutually different voltammetry modes equal in number to the H2, O2, and H2 O2 to be analyzed; means for separately applying the three voltage-time waveform signals to the working electrode, thereby performing the three voltammetry modes, wherein each of the three voltage-time waveform signals electrolyzes the solution, thereby producing a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding voltammetry mode; means for measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the three voltage-=time waveform signals; and means for calculating respective concentrations of the H2, O2, and H2 O2 to be analyzed on the basis of the measured ones of a limiting current and a peak current.
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4. A solution quantitative analysis apparatus comprising:
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an electrolytic cell for electrolyzing a solution containing a plurality of chemical species to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode; means for producing a plurality of mutually different voltage-time waveform signals corresponding to a plurality of mutually different pulse voltammetry modes equal in number to the plurality of chemical species to be analyzed; means for separately applying the plurality of voltage-time waveform signals to the working electrode, thereby performing the plurality of pulse voltammetry modes, wherein each of the plurality of voltage-time waveform signals electrolyzes the solution, thereby producing a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding pulse voltammetry mode; means for measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the plurality of voltage-time waveform signals; and means for calculating respective concentrations of the plurality of chemical species to be analyzed on the basis of the measured ones of a limiting current and a peak current.
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5. A quantitative analysis apparatus for simultaneous analysis of H2 O2 and one of H2 and O2 comprising:
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an electrolytic cell for electrolyzing a solution containing H2 O2 and one of H2 and O2 to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode; means for producing two mutually different voltage-time waveform signals corresponding to two mutually different pulse voltammetry modes equal in number to the H2 O2 and one of H2 and O2 to be analyzed; means for separately applying the two voltage-time waveform signals to the working electrode, thereby performing the two pulse voltammetry modes, wherein each of the two voltage-time waveform signals electrolyzes the solution, thereby producing a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding pulse voltammetry mode; means for measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the two voltage-time waveform signals; and means for calculating respective concentrations of the H2 O2 and one of H2 and O2 to be analyzed on the basis of the measured ones of a limiting current and a peak current. - View Dependent Claims (6)
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7. A quantitative analysis apparatus for simultaneous analysis of H2, O2, and H2 O2 comprising:
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an electrolytic cell for electrolyzing a solution containing H2, O2, and H2 O2 to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode; means for producing three mutually different voltage-time waveform signals corresponding to three mutually different pulse voltammetry modes equal in number to the H2, O2, and H2 O2 to be analyzed; means for separately applying the three voltage-time waveform signals to the working electrode, thereby performing the three pulse voltammetry modes, wherein each of the three voltage-time waveform signals electrolyzes the solution, thereby producing a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding pulse voltammetry mode; means for measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the three voltage-time waveform signals; and means for calculating respective concentrations of the H2, O2, and H2 O2 to be analyzed on the basis of the measured ones of a limiting current and a peak current.
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8. A solution quantitative analysis apparatus comprising:
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an electrolytic cell for electrolyzing a solution containing a plurality of chemical species to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode; a potentiostat for applying a voltage to the working electrode; and a CPU including; means for producing a plurality of mutually different voltage-time waveform signals corresponding to a plurality of mutually different voltammetry modes equal in number to the plurality of chemical species to be analyzed; means for supplying the plurality of voltage-time waveform signals to the potentiostat such that the potentiostat separately applies the plurality of voltage-time waveform signals to the working electrode, thereby performing the plurality of voltammetry modes, wherein each of the plurality of voltage-time waveform signals electrolyzes the solution, thereby producing a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding voltammetry mode; means for storing results of each of the plurality of voltammetry modes in the form of a relationship between an electrolysis current and a voltage which produced it; means for measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the plurality of voltage-time waveform signals on the basis of the results stored in the storing means; and means for calculating respective concentrations of the plurality of chemical species to be analyzed on the basis of the measured ones of a limiting current and a peak current.
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9. A solution quantitative analysis apparatus comprising:
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an electrolytic cell for electrolyzing a solution containing a plurality of chemical species to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode; a potentiostat for applying a voltage to the working electrode; and a CPU including; means for producing a plurality of mutually different voltage-time waveform signals corresponding to a plurality of mutually different pulse voltammetry modes equal in number to the plurality of chemical species to be analyzed; means for supplying the plurality of voltage-time waveform signals to the potentiostat such that the potentiostat separately applies the plurality of voltage-time waveform signals to the working electrode, thereby performing the plurality of mutually different pulse voltammetry modes, wherein each of the plurality of voltage-time waveform signals electrolyzes the solution, thereby producing a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding pulse voltammetry mode; means for storing results of each of the plurality of pulse voltammetry modes in the form of a relationship between an electrolysis current and a voltage which produced it; means for measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the plurality of voltage-time waveform signals on the basis of the results stored in the storing means; and means for calculating respective concentrations of the plurality of chemical species to be analyzed on the basis of the measured ones of a limiting current and a peak current.
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10. A quantitative analysis apparatus for simultaneous analysis of H2 O2 and one of H2 and O2 comprising:
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an electrolytic cell for electrolyzing a solution containing H2 O2 and one of H2 and O2 to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode; a potentiostat for applying a voltage to the working electrode; and a CPU including; means for producing two mutually different voltage-time waveform signals corresponding to two mutually different voltammetry modes equal in number to the H2 O2 and one of H2 and O2 to be analyzed; means for supplying the two voltage-time waveform signals to the potentiostat such that the potentiostat separately applies the two voltage-time waveform signals to the working electrode, thereby performing the two voltammetry modes, wherein each of the two voltage-time waveform signals electrolyzes the solution, thereby producing a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding voltammetry mode; means for storing results of each of the two voltammetry modes in the form of a relationship between an electrolysis current and a voltage which produced it; means for measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the two voltage-time waveform signals on the basis of the results stored in the storing means; and means for calculating respective concentrations of the H2 O2 and one of H2 and O2 to be analyzed on the basis of the measured ones of a limiting current and a peak current.
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11. A quantitative analysis apparatus for simultaneous analysis of H2 O2 and one of H2 and O2 comprising:
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an electrolytic cell for electrolyzing a solution containing H2 O2 and one of H2 and O2 to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode; a potentiostat for applying a voltage to the working electrode; and a CPU including; means for producing two mutually different voltage-time waveform signals corresponding to two mutually different pulse voltammetry modes equal in number to the H2 O2 and one of H2 and O2 to be analyzed; means for supplying the two voltage-time waveform signals to the potentiostat such that the potentiostat separately applies the two voltage-time waveform signals to the working electrode, thereby performing the two pulse voltammetry modes, wherein each of the two voltage-time waveform signals electrolyzes the solution, thereby producing a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding voltammetry mode; means for storing results of each of the two pulse voltammetry modes in the form of a relationship between an electrolysis current and a voltage which produces it; means for measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the two voltage-time waveform signals on the basis of the results stored in the storing means; and means for calculating respective concentrations of the H2 O2 and one of H2 and O2 to be analyzed on the basis of the measured ones of a limiting current and a peak current.
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12. A quantitative analysis apparatus for simultaneous analysis of H2 O2 and one of H2 and O2 comprising:
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an electrolytic cell for electrolyzing a solution containing H2 O2 and one of H2 and O2 to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode; a potentiostat for applying a voltage to the working electrode; and a CPU including; means for producing a first voltage-time waveform signal corresponding to a normal pulse voltammetry mode and a second voltage-time waveform signal corresponding to a differential pulse voltammetry mode; means for supplying the first and second voltage-time waveform signals to the potentiostat such that the potentiostat separately applies the first voltage-time waveform signal to the working electrode, thereby performing the normal pulse voltammetry mode, and the second voltage-time waveform signal to the working electrode, thereby performing the differential pulse voltammetry mode, wherein the first and second voltage-time waveform signals electrolyze the solution, thereby producing respective electrolysis currents respectively having a limiting current and a peak current; means for storing results of the normal pulse voltammetry mode and the differential voltammetry mode in the form of a relationship between an electrolysis current and a voltage which produced it; means for measuring the limiting current of the electrolysis current produced by the first voltage-time waveform signal and the peak current of the electrolysis current produced by the second voltage-time waveform signal on the basis of the results stored in the storing means; and means for calculating respective concentrations of the H2 O2 and one of H2 and O2 to be analyzed on the basis of the measured limiting current and peak current.
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13. A quantitative analysis apparatus for simultaneous analysis of H2, O2, and H2 O2 comprising:
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an electrolytic cell for electrolyzing a solution containing H2, O2, and H2 O2 to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode; a potentiostat for applying a voltage to the working electrode; and a CPU including; means for producing three mutually different voltage-time waveform signals corresponding to three mutually different voltammetry modes equal in number to the H2, O2, and H2 O2 to be analyzed; means for supplying the three voltage-time waveform signals to the potentiostat such that the potentiostat separately applies the three voltage-time waveform signals to the working electrode, thereby performing the three voltammetry modes, wherein each of the three voltage-time waveform signals electrolyzes the solution, thereby producing a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding voltammetry mode; means for storing results of each of the three voltammetry modes in the form of a relationship between an electrolysis current and a voltage which produced it; means for measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the plurality of voltage-time waveform signals on the basis of the results stored in the storing means; and means for calculating respective concentrations of the H2, O2, and H2 O2 to be analyzed on the basis of the measured ones of a limiting current and a peak current. - View Dependent Claims (14)
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15. A method for performing quantitative analysis of a solution using an electrolytic cell for electrolyzing a solution containing a plurality of chemical species to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode, the method comprising the steps of:
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separately applying a plurality of mutually different voltage-time waveform signals to the working electrode for performing a corresponding plurality of mutually different voltammetry modes corresponding to the plurality of chemical species to be analyzed, wherein each of the plurality of voltage-time waveform signals electrolyzes the solution to produce a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding voltammetry mode; measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the plurality of voltage-time waveform signals; and calculating respective concentrations of the plurality of chemical species to be analyzed on the basis of the measured ones of a limiting current and a peak current. - View Dependent Claims (16)
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17. A method for performing simultaneous quantitative analysis of H2, O2, and H2 O2 using an electrolytic cell for electrolyzing a solution containing H2, O2, and H2 O2 to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode, the method comprising the steps of:
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separately applying three mutually different voltage-time waveform signals to the working electrode for performing three mutually different voltammetry modes, wherein each of the three voltage-time waveform signals electrolyzes the solution to produce a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding voltammetry mode; measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the three voltage-time waveform signals; and calculating respective concentrations of the H2, O2, and H2 O2 to be analyzed on the basis of the measured ones of a limiting current and a peak current. - View Dependent Claims (18)
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19. A method for performing simultaneous quantitative analysis of H2 O2 and one of H2 and O2 using an electrolytic cell for electrolyzing a solution containing H2 O2 and one of H2 and O2 to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode, the method comprising the steps of:
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separately applying two mutually different voltage-time waveform signals to the working electrode for performing two mutually different voltammetry modes, wherein each of the two voltage-time waveform signals electrolyzes the solution to produce a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding voltammetry mode; measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the two voltage-time waveform signals; and calculating respective concentrations of the H2 O2 and one of H2 and O2 to be analyzed on the basis of the measured ones of a limiting current and a peak current.
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20. A solution quantitative analysis apparatus for analysis of reactor water in a nuclear reactor having a primary water-based cooling system comprising:
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an electrolytic cell for electrolyzing reactor water in at least one location in the primary water-based cooling system in the nuclear reactor, the reactor water containing a plurality of chemical species to be analyzed, the electrolytic cell including a working electrode, a counter electrode, and a reference electrode; means for producing a plurality of mutually different voltage-time waveform signals corresponding to a plurality of mutually different voltammetry modes equal in number to the plurality of chemical species to be analyzed; means for separately applying the plurality of voltage-time waveform signals to the working electrode, thereby performing the plurality of voltammetry modes, wherein each of the plurality of voltage-time waveform signals electrolyzes the reactor water, thereby producing a respective electrolysis current having one of a limiting current and a peak current depending on the corresponding voltammetry mode; means for measuring the one of a limiting current and a peak current of the electrolysis current produced by each of the plurality of voltage-time waveform signals; and means for calculating respective concentrations of the plurality of chemical species to be analyzed on the basis of the measured ones of a limiting current and a peak current.
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Specification