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

摘要

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.