Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Michael Krausa

Peter Elsner

Rudolf Emmerich

Frank S Becker

Stefan Krebs

Klaus Schorb

Carsten Cremers

Michael Dipl-Ing Walch

Axel Dipl -Ing Kauffmann

Peter Prof Eyerer

A method and device for the detection of substances such as nitrotoluene, trinitrotoluene, dinitrotoluene, or derivatives, wherein a working electrode and an opposing electrode are contacted with the substance via a viscous electrolyte layer and a voltage is applied to the working electrode whose value is increased and decreased at least once with substantially equal beginning and end values within a predetermined time period, wherein the current strength is determined during this at least one measurement cycle in dependence on the applied voltage, is distinguished in that a plurality of measurement cycles are scanned, and differences of current values of sequential measurement cycles are determined and, in the event of the occurrence of a cathode current maximum, the associated voltage value is determined, held constant and the current strength extracted.

Method and device for the detection of not easily volatized substances

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Pfinztal, Germany

Michael Krausa