Device for optical measuring of physical dimensions and material concentrations

US5057431A · kind A · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Dietrich W. Lubbers · Dortmund, DE
• Klaus-Peter Volkl · Lüdinghausen, DE
• Norbert Opitz

Key dates

• Filing date: Sep 15, 1988
• Grant date: Oct 15, 1991
• Expiry date: Sep 15, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T436/255
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An optode designed to prevent washing away of the indicator and reagent from a membrane is located within an optical device that measures substance concentrations. The reagent and indicator materials are covalently bound on the membrane. The membrane can be a polysaccharide, especially cellulose, an acid glycol ester, or it can contain silicon. The indicator and/or reagent can be covalently bound to the membrane by a bridge molecular, particularly a multifunctional aldehyde, glutaraldehyde or a silane.