Electrochemical-enzymatic sensor

US5746898A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventor

• Walter Preidel · Erlangen, DE

Key dates

• Filing date: Nov 12, 1992
• Grant date: May 5, 1998
• Expiry date: Nov 12, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S435/817
• WIPO field: Biotechnology
• WIPO sector: Chemistry

Abstract

An electrochemical-enzymatic sensor for the determination of substances, in particular glucose, in body fluids, which possesses a good long-term stability, includes: a sensor electrode of electrocatalytically inactive carbon, a counterelectrode, a reference electrode, an enzyme-containing layer located before the sensor electrode, and a diaphragm of biocompatible, hydrophilic, oxygen-permeable material covering the enzyme layer toward the body fluid and retaining the enzyme.