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A long-term lifetime amperometric glucose sensor with a perfluorocarbon polymer coating
1NEC Corporation, 4-1-1 Miyazaki Miyamae-ku, Kawasaki, Kanagawa 216-8555, Japan. matsu@rel.cl.nec.co.jp
Biosensors & Bioelectronics
|June 8, 2001
Summary
This study presents a novel amperometric glucose sensor with a four-layered membrane for accurate glucose monitoring. The sensor demonstrates long-term stability and resistance to interfering substances, showing high correlation with clinical analyses.
Area of Science:
- Biomedical Engineering
- Electrochemistry
- Biosensors
Background:
- Accurate glucose monitoring is crucial for diabetes management.
- Existing glucose sensors face challenges with stability and interference.
Purpose of the Study:
- To develop and evaluate a novel amperometric glucose sensor with enhanced stability and specificity.
- To assess the sensor's performance over an extended period and in real-world samples.
Main Methods:
- Fabrication of a four-layered electrode membrane: 3-aminopropyltriethoxysilane (gamma-APTES), Nafion, glucose oxidase (GOX), and perfluorocarbon polymer (PFCP).
- Amperometric testing to determine glucose concentrations.
- Stability testing over 66 days.
- Interference testing with ascorbic acid, uric acid, and p-acetaminophen.
- Validation using diabetic urine samples against Glucose-Dehydrogenase clinical laboratory analyses.
Main Results:
- The sensor accurately determined glucose concentrations from 2.8 to 167 mM.
- Consistent performance was maintained over 66 days with no increase in response time.
- The sensor exhibited imperviousness to common interfering species.
- Diabetic urine samples showed an excellent correlation coefficient of 0.985 with clinical analyses.
Conclusions:
- The developed multi-layered amperometric glucose sensor offers a stable, specific, and accurate solution for glucose monitoring.
- Its performance characteristics suggest potential for reliable clinical application in diabetes management.