ELECTRODE AND ELECTROCHEMICAL CELL, ANALYZER THEREFOR, AND MANUFACTURING METHOD THEREFOR

PROBLEM TO BE SOLVED: To provide an electrode and electrochemical cell as well as an electrochemical analyzer for improving long-term stability of analytical data.SOLUTION: An action electrode 2, a counter electrode 3 and a reference electrode 4 are arranged in an electrochemical cell 1. The action electrode 2 is an electrode constituted by forming electrical wiring on a composite material contained by dispersing metal oxide in a base material composed of platinum or platinum alloy. The metal oxide is selected from zirconium oxide, tantalum oxide and niobium oxide, and the content percentages of zirconium, tantalum and niobium in platinum or platinum alloy are respectively 0.005 to 1 wt.% in metal conversion. When an orientation rate (%) of crystal orientation obtained by X-ray diffraction measurement of an electrode surface is set to I (hkl)/ I (hkl)×100 (provided that, I (hkl) is a diffraction intensity integrated value of each surface and I (hkl) is the sum of diffraction intensity integrated values of (hkl)), the orientation rate of one crystal orientation out of a plurality of obtained crystal orientations is 80% and more.