Nakano Vinegar Co., Ltd.

Tanita Corporation

Mitsui Engineering and Shipbuilding Company Limited

Shunichi Uchiyama

Yoshiya Kawamura

Hirofumi Akano

Takeshi Sato

Shuichi Suzuki

Shinichi Harima

Masahiro Fukaya

Sumio Akita

Kazuyo Kajino

Tatsuhiko Yajima

Ko Furukawa

Hiroaki Ebisuya

Disclosed is an electrochemical sensor comprising a work electrode and a reference electrode, said sensor adapted to measure the characteristics of a liquid under test, based on the relative electric potential difference and electric current between the work electrode and the reference electrode both immersed in the liquid under test, said work electrode comprising a substrate that reacts to the liquid under test for generating an electric potential according to the concentration of the liquid under test, and said reference electrode comprising a substrate that reacts to the liquid under test for generating a fixed electric potential. According to the present invention, at least one of the work electrode and the reference electrode comprises said substrate coated with a function film for serving to generate the electric potential through the intervention of the film between said substrate and the liquid under test.

Electrochemical sensor

The present invention provides a rapid coulometric analysis for the quantitative determination of a sample substance with high reproducibility without any application of voltage etc. from the outside, as well as a galvanic cell and a device for use in said coulometric analysis. According to the present invention, a wide variety of components can be analyzed by selection of electroactive substance introduced into the galvanic cell. The present invention enables a simple and easy analysis for food components such as glutamic acid, ascorbic acid, etc., water quality such as COD, etc.

Coulometric analysis method and a device therefor

The present invention provides a rapid coulometric analysis for the quantitative determination of a sample substance wherein the coulometric analysis has high reproducibility without any application of voltage, etc., from an outside source, as well as a galvanic cell and a device for use in said coulometric analysis. According to the present invention, a wide variety of components can be analyzed by selection of electroactive substance introduced into the galvanic cell. The present invention enables a simple and easy analysis for food components such as glutamic acid, ascorbic acid, etc., water quality such as COD, etc.

An electroanalytical method which can detect and determine a substance in a short time, with stability and simply is provided, which method comprises

Electroanalytical method

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Fukaya, Japan

Shunichi Uchiyama