Method for the electrochemical analysis of electrolytic components in a sample liquid

US4838999A · kind A · utility

Assignee

• Boehringer Mannheim GmbH · DE

Inventors

• Hans-Peter Haar · Wiesloch, DE
• Hermann Edelmann · Tutzing, DE
• Horst Herrmann
• Joachim Thiery · Mannheim, DE

Key dates

• Filing date: Aug 17, 1988
• Grant date: Jun 13, 1989
• Expiry date: Aug 17, 2008

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2035/1062
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present invention provides a device for the electrochemical analysis of electrolytic components in a sample liquid (58), especially of a body fluid, with a selective measurement electrode (20) for a kind of ion to be analysed, a reference half cell, which includes a conducting-off element (30) cooperating in the operational state with a reference electrolyte (56), and a voltage measurement device (34) for the measurement of the voltage between the measurement electrode and the conducting-off element (30), wherein the measurement electrode (20) is arranged on a pipe (22) provided with a sucking-in opening (23) for the sample liquid (58), the conducting-off element (30) of the reference half cell being arranged on the pipe (22) in such a manner that it directly contacts a liquid (56) present therein, the conducting-off element (30) thereby being arranged in the pipe (22) in the sucking-in direction behind the measurement electrode (20), a sucking-in device (36) being provided through which a sample liquid (58) can be sucked in and, together with a liquid reference electrolyte present in the pipe (22) or previously sucked in, is transportable subsequent to this in the same directi…