Apparatus and method for sensing a time varying ionic current in an electrolytic system
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United States of America Patent
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Dec 1, 2015
Grant Date -
Aug 6, 2009
app pub date -
May 10, 2007
filing date -
Jun 15, 2006
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Abstract
An apparatus and method for sensing time varying ionic current in an electrolytic system having a first fluid chamber and a second fluid chamber separated by a barrier structure is provided, wherein the barrier structure includes thick walls and a substrate having an orifice therein, with the first and second fluid chambers being in communication via the orifice. A potential is applied between electrodes in respective first and second fluid chambers, thus driving an electrical current between them and through the orifice. Total capacitance of the system is less than 10 pF. Analytes are added to one of the first and second fluid chambers and time varying ionic current that passes across the orifice is measured. An amplifier proximal to the barrier structure and electrodes amplifies the ionic current signal.
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