Electrochemical detector

Details Electrochemical detector Electrochemical detector

1990-08-16

1992-03-31

Nguyen, Nam X.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204412, 422 70, G01N 2726

Patent

active

051005301

ABSTRACT:
An electrochemical detector comprising an electrochemical cell (11), a working electrode (1), an auxiliary electrode (2), a reference electrode (3), a potentiostat (4), and a circuit (7,8) for deriving a signal indicative of the current developed at the working electrode additionally comprises means for monitoring and determining the potential of the reference electrode (3). These means comprise an electrometer circuit (9) which can be connected via a switch (S2) to the auxiliary electrode (2) to measure the potential of the reference electrode. During the measurement, the working electrode (1) is disconnected from the circuit (7,8) which is at the same time connected to the electrometer circuit (9) via switch (S1). The invention permits to recognize measuring errors associated with instabilities in the reference electrode potential (FIG. 1).

REFERENCES:
patent: 4227988 (1980-10-01), Galwey et al.
patent: 4366033 (1982-12-01), Richter et al.
patent: 4498039 (1985-02-01), Galwey et al.
patent: 4499423 (1985-02-01), Matthiessen
patent: 4506226 (1985-03-01), Luce et al.
patent: 4642172 (1987-02-01), Fruhwald
patent: 4664886 (1987-05-01), Novack et al.

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