Polarographic chemical sensor with external reference electrode
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United States of America Patent
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Jan 7, 1992
Grant Date -
N/A
app pub date -
Jan 22, 1990
filing date -
Jan 22, 1990
priority date (Note) -
Expired
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Abstract
An electroanalytical electrode assembly includes an electrically conductive working electrode having a body of electrolyte material thereupon and separated from the analytical environment by a hydrophobic membrane. The membrane has an electrical conductivity greater than the electrical conductivity of the remainder of the measuring circuit and is selectably permeable for a preselected and ionic species, so as to provide a stable membrane potential. Use of an assembly of this type allows for placement of a reference electrode external of the membrane.
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