Multilayer analytical element for the determination of an analyte in a liquid

US5814522A · kind A · utility

Assignee

• Boeringer Mannheim GmbH · DE

Inventors

• Volker Zimmer · Laumersheim, DE
• Heinz Macho · Fürth, DE
• Rolf Lerch · Ilvesheim, DE

Key dates

• Filing date: Jun 20, 1996
• Grant date: Sep 29, 1998
• Expiry date: Jun 20, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/525
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sample application zone and detection zone are arranged on a pile-like complex made of a fleece and a porous membrane which are in a direct or indirect contact that enables passage of liquid through the contact area and the membrane is a polyamide, polyvinylidene difluoride, polyether sulfone or polysulfone membrane which transports liquid significantly slower over the area than the fleece.