LIQUID CHROMATOGRAPHY ELECTROCHEMICAL DETECTOR, LIQUID CHROMATOGRAPH, AND ANALYZING METHOD USING THE CHROMATOGRAPH

摘要

A liquid chromatography electrochemical detector can be used even in organic solvent by suppressing the impurity adsorption on the surface of its working electrode and well protecting the electrode main part of the reference electrode sufficiently. In the liquid chromatography electrochemical detector which is composed of a triode potentiostat having the reference electrode (2), the working electrode (3) and a counter electrode (4), the reference electrode (2) is composed of an electrode main part (11) and two cylinders, i.e. an inner cylinder (16) and an outer cylinder (20), in which the electrode main part (11) is housed and protected. The electrode main part (11) is housed in the inner cylinder (16) together with electrolyte in the inner cylinder (16) which is housed in the outer cylinder (20) together with electrolyte, constituting a double construction which doubly protects the electrode main part (11) with two electrolyte layers and two cylinders. The potential of the working electrode (3) can be periodically changed by the program function of the electronic circuit (10) of the apparatus to which the working electrode (3) is connected.