Max-planck-gesellschaft Zur F&#xf6;rderung Der Wissenschaften E. V.

Klaus P Volkl

Dietrich W Lubbers

Norbert Opitz

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.

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Ludinghausen, Germany

Klaus P Volkl