Electrode for electrochemical detectors
AssigneeMitsubishi Petrochemical Co., Ltd.
InventorsNobuharu Takai, Yoshiteru Kageyama, Yoshiaki Sawada, Akira Yoshida
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Abstract
An electrode for a coulometric type of electrochemical detector, comprising a formed product of a porous, graphitic carbon having the following physical properties (1), (2) and (3): (1) an average pore diameter of 0.1 to 50 .mu.m, (2) a specific surface area of 10 m.sup.2 /g or more, and (3) an average interlaminar spacing (d.sub.002) of carbon of 3.35 to 3.42 .ANG., as determined by X-ray diffraction analysis.
Claims9
A process for producing an electrode for a coulometric type of electrochemical detector, which comprises molding a composition comprising carbon fibers having a specific surface area of 10 m.sup.2 /g or more, a diameter of 0.01 to 2 .mu.m and a length of 1 to 500 .mu.m obtained by thermally decomposing a carbon source compound in the presence of a catalyst consisting of ultrafine particles of a transition metal to grow carbon in a vapor phase, a medium containing a carbonizable binder material and a pore-forming promotor and, then, sintering the thus molded product in a non-oxidizing atmosphere, said electrode comprising a formed product of a porous, graphitic carbon having the following physical properties (1), (2) and (3):
- (1) an average pore diameter of 0.1 to 50 .mu.m,
- (2) a specific surface area of 50 m.sup.2 /g or more, and
- (3) an average interlaminar spacing (d.sub.002) of carbon of 3.35 to 3.42 .ANG., as determined by X-ray diffraction analysis.
An analytical apparatus comprising an analytical column for liquid chromatography and at least one coulometric type of electrochemical detector,
- said detector having an electrode comprising a formed product of a porous, graphitic carbon material having the following physical properties (1), (2) and (3):
- (1) an average pore diameter of 0.1 to 50 .mu.m,
- (2) a specific surface area of 50 m.sup.2 /g or more, and
- (3) an average interlaminar spacing (d.sub.002) of carbon of 3.35 to 3.42 .ANG., as determined by X-ray diffraction analysis.
Dependencies are inferred from the claim text.