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    Rapid-sweep electrochemical detector for chemical analysis of flow streams
    2.
    发明授权
    Rapid-sweep electrochemical detector for chemical analysis of flow streams 失效
    快速扫描电化学检测器，用于流动化学分析

    公开(公告)号：US4628463A

    公开(公告)日：1986-12-09

    申请号：US585429

    申请日：1984-03-05

    Applicant: Peter E. Sturrock ,  Gerald E. O'Brien

    Inventor： Peter E. Sturrock ,  Gerald E. O'Brien

    IPC: G01N27/48 ,  G01N27/46 ,  G06F15/20 ,  G06F15/46

    CPC classification number: G01N27/48

    Abstract: A system for identification and quantification of electrochemically active compounds in a flow stream involves stepping the electrode potential in a detector rapidly through the range of interest with a square wave superimposed on a staircase signal and recording the current response as functions of step number and sweep number, i.e., as functions of voltage and time. From the recorded data, a three-dimensional graph (potential, time and current) is structured and from which identification and quantification of the electrochemically active compounds is effected with minimum expenditure of time. The system includes a potentiostat controlled by a computer with, however, independent logic control contained in the potentiostat. Provision is also made to compensate automatically for variations in resistance between the cell electrodes.

    Abstract translation: 用于在流动流中识别和定量电化学活性化合物的系统包括通过叠加在阶梯信号上的方波快速地将检测器中的电极电位逐步移动到感兴趣的范围内，并将当前响应记录为步骤号和扫描数的函数 ，即作为电压和时间的函数。 从记录的数据中，构建三维图（电位，时间和电流），并且以最小的时间花费实现电化学活性化合物的鉴定和定量。 该系统包括由计算机控制的恒电位仪，但是具有包含在恒电位仪中的独立逻辑控制。 还提供了自动补偿电池电极之间的电阻变化。

    Digital electrochemical instrument with background compensation
    3.
    发明授权
    Digital electrochemical instrument with background compensation 失效
    数字电化学仪器具有背景补偿

    公开(公告)号：US5374892A

    公开(公告)日：1994-12-20

    申请号：US26440

    申请日：1993-03-04

    Applicant: Peter E. Sturrock ,  Gerald E. O'Brien

    Inventor： Peter E. Sturrock ,  Gerald E. O'Brien

    IPC: G01N27/416 ,  G01N27/48 ,  G01N27/00

    CPC classification number: G01N27/48

    Abstract: An instrument and method for measuring chemical properties, the instrument having electrodes suitable for immersion in a chemical solution. A voltage source and a current-sensing circuit are connected to the electrodes to measure the current produced in the solution in response to a voltage applied to the electrodes to determine a value of the chemical in the solution. The instrument and method further include background compensation for offsetting the value of the analyte by an amount which is reflective of the background value of the solution. The background value is stored in an internal memory of the instrument so that when new experimental measurements are taken, the measurements are immediately offset by the background portion of the new experimental measurements. This allows operation of the instrument at high gain levels, resulting in a broad dynamic range and greater useful precision in the output signal.

    Abstract translation: 用于测量化学性质的仪器和方法，仪器具有适合浸入化学溶液中的电极。 电压源和电流检测电路连接到电极，以响应于施加到电极的电压来测量溶液中产生的电流，以确定溶液中化学品的值。 该仪器和方法还包括背景补偿，以将分析物的值抵消反映溶液背景值的量。 背景值存储在仪器的内部存储器中，以便在进行新的实验测量时，测量值立即被新的实验测量的背景部分所抵消。 这允许仪器在高增益水平下运行，从而产生广泛的动态范围和更大的有用精度的输出信号。

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