Systems and methods for improved stability of electrochemical sensors
First Claim
1. An electrochemical system, comprising:
- an electrochemical cell having a first electrode and a second electrode;
a meter including a control unit connected to the electrochemical cell so that the control unit is configured to apply at least one potential between the first electrode and the second electrode of the electrochemical cell to determine an analyte concentration of an applied sample; and
the control unit configured to determine a measurement of capacitance correlating to an age or storage condition of the electrochemical cell and further configured to use said capacitance measurement to calculate a corrected concentration of the analyte in the sample.
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Accused Products
Abstract
Methods for determining a concentration of an analyte in a sample, and the devices and systems used in conjunction with the same, are provided herein. In one exemplary embodiment of a method for determining a concentration of an analyte in a sample, a sample including an analyte is provided in a sample analyzing device having a working and a counter electrode. An electric potential is applied between the electrodes and a measurement of a parameter correlating to changes in a physical property of the sample analyzing device is calculated. A concentration of the analyte in view of the parameter correlating to a change in the physical property can then be determined. Systems and devices that take advantage of the parameter correlating to changes in a physical property to make analyte concentration determinations are also provided.
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Citations
15 Claims
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1. An electrochemical system, comprising:
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an electrochemical cell having a first electrode and a second electrode; a meter including a control unit connected to the electrochemical cell so that the control unit is configured to apply at least one potential between the first electrode and the second electrode of the electrochemical cell to determine an analyte concentration of an applied sample; and the control unit configured to determine a measurement of capacitance correlating to an age or storage condition of the electrochemical cell and further configured to use said capacitance measurement to calculate a corrected concentration of the analyte in the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electrochemical system, comprising:
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(a) a test strip including electrical contacts configured to mate with a test meter and an electrochemical cell comprising; (i) a first electrode and a second electrode in a spaced apart relationship; and (ii) a reagent; and (b) the test meter including a processor configured to receive current data from the test strip upon application of voltages to the test strip, and further configured to determine a capacitance corrected glucose concentration based on a calculated glucose concentration and a measured capacitance wherein the measured capacitance correlates to at least one of an age or storage condition of the test strip, the processor being configured to determine a correction factor based on the measured capacitance to correct for the age or storage condition of the electrochemical cell. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification