• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A stripping analysis method comprises a preelectrolysis step during which liquid to be analyzed is introduced into a measurement cell at a pulsating rate, a working electrode is vibrated at an ultrasonic frequency, and the voltage potential between the working electrode and a reference electrode is adjusted to a level which allows the substances to be determined to be deposited on the working electrode. After the preelectrolysis step is a stripping step during which the voltage potential between the working electrode and the reference electrode is scanned through the potential range where the substances to be determined are dissolved back to the liquid and current is measured while the liquid in the measurement cell remains essentially undisturbed. The method also comprises an elimination step during which the voltage potential between the working electrode and the reference electrode is adjusted to a level at which the working electrode is regenerated. The products of the measurement step are removed from the cell by vibrating the working electrode at an ultrasonic frequency and thereby disturbing the liquid in the cell, and introducing liquid into the cell at a non-pulsating rate and thereby displacing liquid from the cell.
    公开号:SU1351522A3
    申请号:SU3830905
    申请日:1984-12-28
    公开日:1987-11-07
    发明作者:Матти Олави Салохейма Кари；Вилхо Рантапуска Сеппо
    申请人:Оутокумпу Ой (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the field of electrochemical studies of electrolytic solutions and can be used to measure the concentration of ions in solution.
    The purpose of the invention is to increase the measurement efficiency by more efficiently cleaning the working electrode and mixing the monitored solution.
    FIG. 1 shows a schematic of a device for measuring the concentration of ions in a solution; in fig. 2 shows an electrochemical cell of a device for measuring the concentration of ions in a solution, a transverse section,
    A device for measuring the concentration of ions in a solution contains a nozzle 1 for supplying a reagent solution, a nozzle 2 for feeding a test solution, a solution supply regulator made in the form of membrane pumps 3 and 4 connected to nozzles 1 and 2, an electrochemical cell 5, after 1 conduit 6 connected to diaphragm pumps 3 and 4, measuring unit 7 electrically connected to working electrode 8 located in the electrochemical cell 5, return electrode 9, reference electrode 10 and membrane pumps 3 and 4, an ultrasonic vibrator 11 fixed on the working electrode 8 so that they are on the same vertical axis, an ultrasonic generator 12 electrically connected to the vibrator 11 and the measuring unit 7, and an outlet pipe 13 for removing residual substances from the working cavity 14 electrochemical cell 5. Ultrasonic vibrator 11 consists of a resonator 15 and piezocrystals 16 that generate ultrasonic vibrations.
    Position 17 denotes a glass plate on which working electrode 8 is mounted:
    The essence of the method for measuring the concentration of ions in a solution is as follows.
    In the process of an electrochemical process, which is carried out in an electrochemical cell, during the period of cathode accumulation, the working electrode is exposed to ultrasound and at the same time a pulsating flow of solution is carried out into the cell.
    five
    0
    to form peak currents of the solution.
    Then, the sonication and pulsating flow of the solution are stopped and the concentration of ions in the controlled solution is measured. After the step of measuring the concentration, the residual substances are removed from the electrochemical cell, and in the process of removing the residual substances, the working electrode is again applied to the ultrasound and simultaneously with this effect a pulsating supply of the solution to the electrochemical cell is performed.
    The simultaneous effect of ultrasound and pulsating supply of the solution provides a uniform composition of the solution in the electrochemical cell. The cessation of exposure to ultrasound and pulsating supply of the solution when the solution reaches peak currents makes it possible to eliminate the background in stage 5 of ion concentration measurement. The effect of ultrasound and pulsating supply of the solution at the stage of removing residual substances makes it possible to effectively clean the working electrode and quickly prepare the electrochemical cell for the next measurements.
    The specific implementation of the method is carried out using a concentration measuring device.
    The device works as follows.
    The test solution and the reagent solution are fed via nozzles 2 and 1 to the solution supply controller, made in the form of membrane pumps 3 and 4, controlled by block 7, which feed the solution into the electrochemical cell 5 through short pulses through a common pipeline 6. Pulses are adjusted according to force in such a way that the solution on the surface of the working electrode 8 can be effectively mixed. Simultaneously with pumps 3 and 4, an ultrasonic vibrator 11 driven by a generator 12, which effects ultrasound on the working electrode 8, installed in the working cavity 14 of the electrochemical cell 5, is turned on.
    A reverse electrode 9 and a reference electrode 10 are located on the opposite side of the cavity 14. A working electrode 8, for example of glass carbon, is mounted at the top of the glass plastic.
    five
    0
    five
    0
    3,
    17 so that the working electrode 8 is in direct contact with the ultrasonic resonator 15 and the generating piezocrystal 16 and practically in the same vertical plane with them in order to achieve the maximum ultrasonic amplitude on the surface of the working electrode 8
    Then, an electrochemical process is carried out in the electrochemical cell 5 upon reaching the peak solution currents in the cell 5 is turned off using the measuring unit 7, the pumps 3 and 4, the vibrator M and using the measuring unit 7 containing a computer (not shown), measuring the concentration ions in a controlled solution. After that, at the command received from unit 7, the membrane pumps 3 and 4 and the ultrasonic vibrator 11 are again switched on, which almost completely removes the residual substances recovered on the working electrode 8 through the outlet pipe 13,
    The voltammograms stored in the memory of the computer installed in the measuring unit 7 are read out, and as a result, the background voltage of the voltage meter is obtained.




    When using the proposed method of measurement, the surface of the working electrode 8 remains active, and the measurement results are stable. In addition, the method provides cleaning and stabilization of the surface of the electrode 8. Therefore, when using a mercury membrane electrode as a working electrode, for example, a mercury membrane can be easily removed from the electrode surface without resorting to mechanical cleaning. .
    The simultaneous use of ultra sound and the adjustment of the flow rate of the solution according to the invention can be used in other methods of volt-amperemetric measurement of the content of anions and cations.
    权利要求:
    Claims (2)
    [1]
    1. An electrochemical method for measuring the concentration of ions in a solution, consisting in that a controlled solution is supplied to an electrochemical cell with a working electrode, an electrochemical process is performed, during which cathode accumulation is affected
    The ion concentration in the solution is measured by ultrasound on the working electrode, after which residual substances are removed from the electrochemical cell, characterized in that, in order to improve the measurement efficiency, simultaneously with the influence of ultrasound, a pulsating supply of the solution is carried out to form peak solution currents, and Ultrasound and pulsating flow of the solution are also carried out at the stage of removing residual substances.
    [2]
    2. A device for measuring the concentration of ions in a solution, containing an electrochemical cell with a working electrode and an ultrasonic vibrator attached to it and a measuring unit electrically connected to an electrochemical cell and ultrasonic vibrator, characterized in that
    in order to increase the measurement efficiency, it is supplied with a pulsator by regulating the solution supply into the cell, made in the form of a diaphragm pump electrically connected to the measuring unit, and the ultrasonic
    the vibrator and the working electrode are on the same vertical axis.
    Editor V. Danko
    Compiled by S. Volkov Tehred A. Kravchuk
    Order 5302/59 Circulation 776 Subscription
    VNIIGM USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and printing company, Uzhgorod, st. Project, 4
    Proofreader O. Kravtsov
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    同族专利:
    公开号 | 公开日
    AU573293B2|1988-06-02|
    FI70648B|1986-06-06|
    FI834847A0|1983-12-29|
    US4786373A|1988-11-22|
    ZA849933B|1985-08-28|
    CA1241104A|1988-08-23|
    FI834847A|1985-06-30|
    AU3698084A|1985-07-04|
    FI70648C|1986-09-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3479873A|1967-11-13|1969-11-25|Fischer & Porter Co|Self-cleaning electrodes|
    US3658679A|1969-04-14|1972-04-25|Us Air Force|System for determining the hydrogen ion concentration of flowing liquids|
    US3664191A|1970-06-01|1972-05-23|Fischer & Porter Co|Explosion-proof self-cleaning electrodes|
    US3676321A|1970-07-27|1972-07-11|Honeywell Inc|Electrochemical oxygen demand system|
    US4216671A|1974-06-14|1980-08-12|Metropolitan Sanitary District Of Greater Chicago|Automatic cleaning of sensing probes|
    US3904487A|1974-10-29|1975-09-09|Us Navy|Anodic stripping volammetry and apparatus therefor|
    JPS5310478B2|1975-04-28|1978-04-13|
    US4033830A|1976-03-17|1977-07-05|The Foxboro Company|On-line amperometric analysis system and method incorporating automatic flow compensation|
    US4172770A|1978-03-27|1979-10-30|Technicon Instruments Corporation|Flow-through electrochemical system analytical method|US4917774A|1986-04-24|1990-04-17|Shipley Company Inc.|Method for analyzing additive concentration|
    US5292423A|1991-04-09|1994-03-08|New Mexico State University Technology Transfer Corp.|Method and apparatus for trace metal testing|
    US5192403A|1991-05-16|1993-03-09|International Business Machines Corporation|Cyclic voltammetric method for the measurement of concentrations of subcomponents of plating solution additive mixtures|
    US5217112A|1991-09-04|1993-06-08|Almon Amy C|Voltametric analysis apparatus and method|
    DE69331566T2|1992-05-11|2002-10-31|Nippon Telegraph & Telephone|Electrochemical detection method and device therefor|
    US5326448A|1992-10-15|1994-07-05|Telectronics Pacing Systems, Inc.|Method for reducing the polarization of bioelectrical stimulation leads using surface enhancement, and product made thereby|
    US5298129A|1992-11-13|1994-03-29|Hughes Aircraft Company|Method of selectively monitoring trace constituents in plating baths|
    US5298130A|1992-11-13|1994-03-29|Hughes Aircraft Company|Method of monitoring major constituents in plating baths containing codepositing constituents|
    CA2087801C|1993-01-21|1996-08-13|Noranda Ipco Inc.|Method and apparatus for on-line monitoring the quality of a purified metal sulphate solution|
    US5298131A|1993-05-28|1994-03-29|Hughes Aircraft Company|Method of monitoring metal ion content in plating baths|
    WO1995026008A1|1994-03-22|1995-09-28|Intelligent Monitoring Systems|Detecting and classifying contaminants in water|
    GB9407929D0|1994-04-21|1994-06-15|Capteur Sensors & Analysers|Electrochemical analysis of liquid streams|
    US5942103A|1995-02-03|1999-08-24|New Mexico State University Technology Transfer Corporation|Renewable-reagent electrochemical sensor|
    US5676820A|1995-02-03|1997-10-14|New Mexico State University Technology Transfer Corp.|Remote electrochemical sensor|
    IL113563D0|1995-05-01|1995-08-31|R D C Rafael Dev Corp Ltd|Electroanalytical voltammetric cell|
    US5650061A|1995-09-18|1997-07-22|The Regents Of The University Of California|Large amplitude sinusoidal voltammetry|
    US6063259A|1996-06-11|2000-05-16|New Mexico State University Technology Transfer Corporation|Microfabricated thick-film electrochemical sensor for nucleic acid determination|
    法律状态:
    2005-05-10| REG| Reference to a code of a succession state|Ref country code: RU Ref legal event code: MM4A Effective date: 20031229 |
    优先权:
    申请号 | 申请日 | 专利标题
    FI834847A|FI70648C|1983-12-29|1983-12-29|VOLTAMETRISKT MAETNINGSFOERFARANDE OCH ANORDNING FOER DESS TILLAEMPNING|
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