Handheld electrochemical sensor
First Claim
1. A handheld sensor device for measuring an ion concentration in a solution in an electrochemical cell that includes a counter electrode, a working electrode, and a reference electrode, the handheld sensor device comprising:
- a function generator configured to generate a waveform specified by an electrochemical technique; and
a potentiostat integrated with the function generator in a single, portable device, the potentiostat comprising;
a control amplifier configured to provide a current through the counter electrode and the working electrode so as to maintain a predetermined voltage between the working electrode and the reference electrode; and
a current amplifier configured to measure the current provided through the counter electrode and the working electrode,wherein the current amplifier is configured to measure the current throughout an entire range comprising approximately 100 pA to approximately 2 mA.
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Accused Products
Abstract
A handheld sensor device is provided for measuring an ion concentration in a solution. The solution is in an electrochemical cell that includes a counter electrode, a working electrode, and a reference electrode. The sensor includes a control amplifier configured to provide a current through the counter electrode and the working electrode so as to maintain a predetermined voltage between the working electrode and the reference electrode. The sensor also includes a current amplifier configured to measure the current provided through the counter electrode and the working electrode. In one embodiment, the sensor also includes a direct digital frequency synthesizer (DDFS) including a phase accumulator. The DDFS is configured to selectively generate a waveform specified by an electrochemical technique such as square wave voltammetry, cyclic voltammetry, linear sweep voltammetry, differential-pulse polarography, normal-pulse polarography, or other known electrochemical techniques.
44 Citations
18 Claims
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1. A handheld sensor device for measuring an ion concentration in a solution in an electrochemical cell that includes a counter electrode, a working electrode, and a reference electrode, the handheld sensor device comprising:
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a function generator configured to generate a waveform specified by an electrochemical technique; and a potentiostat integrated with the function generator in a single, portable device, the potentiostat comprising; a control amplifier configured to provide a current through the counter electrode and the working electrode so as to maintain a predetermined voltage between the working electrode and the reference electrode; and a current amplifier configured to measure the current provided through the counter electrode and the working electrode, wherein the current amplifier is configured to measure the current throughout an entire range comprising approximately 100 pA to approximately 2 mA. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification