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    • 8. 发明申请
    • CALIBRATION OF ELECTROCHEMICAL SENSOR
    • 电化学传感器校准
    • WO2011073746A2
    • 2011-06-23
    • PCT/IB2010/002747
    • 2010-10-25
    • SCHLUMBERGER TECHNOLOGY B.V.SCHLUMBERGER HOLDINGS LIMITEDSCHLUMBERGER CANADA LIMITEDSERVICES PETROLIERS SCHLUMBERGERPRAD RESEARCH AND DEVELOPMENT LIMITEDSCHLUMBERGER SEACO, INC.LAWRENCE, Nathan
    • LAWRENCE, Nathan
    • G01N27/26G01N33/18G01V3/18E21B47/00
    • G01N27/4163G01N27/308
    • This invention is concerned with electrochemical methods of analysing a fluid for an analyte. It utilises a sensor comprising electrodes and a mediator compound capable of undergoing a cycle of oxidation and reduction in response to varying potential applied to the electrodes, where the compound is also able to undergo a portion of the cycle through chemical reaction with the analyte. As is already known, the sensor is used in a method in which the sensor and the fluid are brought into contact sufficiently for the analyte to react chemically with the mediator, and in a voltammetry procedure, potential is applied to the electrodes while observing current flow with sufficient time for reaction between the mediator compound and the analyte, for thereby observing the concentration of the analyte. The novel characteristic of this invention is a step of calibrating the sensor by applying a rapidly changing potential to the electrodes and observing current flow, the change of this potential and observation of current being sufficiently fast to allow and observe electrochemical oxidation and reduction of the mediator taking place independently of the concentration of analyte, thereby observing the concentration of the mediator compound. The rapid change of potential maybe provided by pulse voltammetry or square wave voltammetry.
    • 本发明涉及分析用于分析物的流体的电化学方法。 它利用包含电极和介质化合物的传感器,其能够响应于施加到电极的变化的电位而经历氧化和还原循环,其中化合物还能够经受与分析物的化学反应的一部分循环。 如已知的那样,传感器用于传感器和流体被充分接触以使分析物与介体发生化学反应的方法中,并且在伏安程序中,电势被施加到电极,同时观察电流 具有足够的时间用于介体化合物和分析物之间的反应,从而观察分析物的浓度。 本发明的新颖特征是通过向电极施加快速变化的电位并观察电流,该电位的变化和电流的观察足够快以允许和观察电化学氧化和还原介体来校准传感器的步骤 独立于分析物的浓度进行,从而观察介体化合物的浓度。 电位的快速变化可以通过脉冲伏安法或方波伏安法来提供。