Method for determining the concentration of electro-chemically convertible substances
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United States of America Patent
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Apr 24, 1990
Issued Date -
N/A
app pub date -
Dec 19, 1986
filing date -
Jul 30, 1982
priority date (Note) -
Expired
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Abstract
The invention involves a method for determining the concentration of electro-chemically convertible substances in a solution by means of an analyzer equipped with a test electrode, so that a precise determination of the concentration, dependable over extended periods, is possible. The invention provides for a potential varying with time within a potential interval to be impressed on the test electrode, for an ac voltage of a predetermined amplitude and frequency to be superimposed on this potential, and for the real and/or imaginary portions of the impedance to be determined for at least one potential step, thus determining the concentration. The method is particularly suited for determining the concentration of glucose in body fluids.
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