Process and diagnostic device for the determination of ammonia and of substrates which react with the formation of ammonia

US4223089A · kind A · utility

Assignee

• Boehringer Mannheim GmbH · DE

Inventors

• Anselm Rothe · Birkenau, DE
• Adolf K. Selle · Birkenau, DE
• Hans Lange
• Walter Rittersdorf · Mannheim, DE
• Wolfgang Werner · Hersbruck, DE

Key dates

• Filing date: Apr 30, 1979
• Grant date: Sep 16, 1980
• Expiry date: Apr 30, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T436/175383
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Diagnostic device for the determination of ammonia having a handle, an ammonia indicator layer thereon and an alkaline buffer-containing reaction layer positioned above the indicator layer a distance of 10 to 200 microns by a spacer member. The reaction layer is readily separated from the indicator layer to reveal the latter at the end of the ammonia test.