Boehringer Mannheim Gmbh

Horst Herrmann

Hans-Peter Haar

Hermann Edelmann

Dieter Knoll

Joachim Thiery

Werner Dietze

Wolfgang Reiser

The present invention provides an electrode arrangement for the electrochemical analysis of components of a liquid, having a base body (7; 53; 85; 103; 139; 155; 175; 193), made of an insulating material with at least one measurement electrode (21; 57; 89; 111; 143; 157; 195) held on the base body, adapted to be brought into phase boundary contact with the liquid to be analysed, said measurement electrode being selective for a predetermined kind of ion in the liquid, and with at least one reference electrode (19; 55; 87; 109; 141; 153; 173; 197; 199) held on the base body and adapted to be brought into phase boundary contact, together with the measurement electrode, with the liquid, wherein the base body carries a removable closure part (45; 61; 91; 107; 137; 163; 187; 203) which, together with the base body, forms a closed hollow chamber (11; 52; 86; 104; 135; 159; 177; 201), the closed hollow chamber containing a standard electrolyte, especially one containing the predetermined kind of ion, defining, with the ion-selective measurement electrode, a predetermined half cell potential, said standard electrolyte being in phase boundary contact not only with the or each measurement electrode but also with the or each reference electrode.

Electrode arrangement for the electrochemical analysis of electrolytic

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 direction in the pipe (22) and the voltage measurement device (34) is activatable in a measurement operational state in that the sample liquid (58) contacts the measurement electrode and the reference liquid (56) contacts the conducting-off element (30) and both liquids are in contact with one another, making possible an ion exchange.

Method for the electrochemical analysis of electrolytic components in a

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Bernried, Germany

Horst Herrmann