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    Digital Electrochemical Instrument With Background Compensation

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    5374892.pdf (964.4Kb)
    Date
    12/20/1994
    Author
    Sturrock, Peter E.
    O'brien, Gerald E.
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    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.
    URI
    http://hdl.handle.net/1853/57175
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