| abstract |
A sensor and a measurement method capable of monitoring pH in vitro or in vivo are provided. A working electrode comprising a diamond microelectrode doped with impurities, a reference electrode acid-treated in the presence of chloride ions and having an Ag / AgCl layer on the surface, and a pH sensor comprising a counter electrode, A constant current is applied between the counter electrodes, and the pH is measured in vitro or in vivo by measuring the pH by chronopotentiometry. [Selection] Figure 3 |