Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1990-05-10
1992-04-28
Niebling, John
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204400, 204406, 204407, G01N 2726
Patent
active
051085780
ABSTRACT:
The present invention comprises an electrochemical metering apparatus that provides for convenient storage and presentation of the analytical electrode, simple assembly, and two calibration modes. The apparatus includes an electrode storage and presentation assembly that permits the user to introduce the electrode into a sample solution while simultaneously observing the meter's output, and store the electrode when not in use. All structural components are intended to fit together with interlocking tabs and windows. A serial port fits within the construction of the main housing without the need for bolts, and battery clips that depend directly from the circuit board obviate the need for wiring connections. The present invention also features two calibration modes. A "segment addition" mode permits separation of the voltage/concentration curve into individually plotted regions, the number of which depends on the number of reference solutions used in the calibration procedure. The segment corresponding most closely to the measured potential of a sample solution is used to calculate concentration. In an alternative calibration mode, one or more reference solutions are used to establish meterd voltage/concentraiton combinations that are compared with expected, known values. Any discrepancies therebetween furnish a "noise level" value associated with the apparatus that can be used to move precisely define the orientation of the voltage/concentration curve.
REFERENCES:
patent: 3902982 (1975-09-01), Nakagawa
patent: 4090925 (1978-05-01), Jungman
patent: 4225410 (1980-09-01), Pace
patent: 4912417 (1990-03-01), Gibboney et al.
Barbookles James
Brockway Laura
Cohen Jeffrey S.
McIntre Christopher
Paquette Thomas
Bell Bruce F.
Niebling John
Orion Research Inc.
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