This invention relates to an electrochemical measuring method utilizing photochemical reactions and an apparatus therefor and more particularly relates to a measuring method suitable for detection of components in solutions and analysis of mechanism of photochemical reactions.
Hitherto, as methods for detecting substances contained in a solution at a high sensitivity by irradiation of light to the solution, there have been known such methods as making the detection by measuring absorption of the irradiated light per se, by measuring fluorescence emitted due to excitation with the irradiated light, by using the thermal lens effect caused by thermal expansion due to light absorption heat and by measuring light-acoustic effect, etc. These methods have the problems that they are liable to be affected by noise caused by external stray light, radiant heat or other noise because the detection is carried out with light, heat or sound.