The type of photocharge carriers in ice was determined by means of an electrolysis technique. It was suggested earlier(1) that irradiation of ice by UV light above 6.5 eV generates positive H3O+ ions, neutral OH. radicals, solvated electrons e(s)(-), D defects, and vacancies of water molecules according to the "autoionization" reaction. Is the photoconductivity (PC) observed purely "protonic", due to motion of H3O+ ions and D defects, or does it have an additional electron component related to the motion of solvated electrons e(s)(-) or their analogies? The presence of the electron component should not produce any additional gas release near the electrodes during an electrolysis process and for that reason can be easily detected as a deviation from Faraday’s law of electrolysis. We found that the amount of gas released per coulomb of charge flow is the same with or without the UV light. Therefore, the UV light does not change the composition (the proportion) of mobile charge carriers in ice, and in 25% of our tests the PC directly demonstrates a purely protonic nature. We also concluded that solvated electrons do not participate in the de conductivity of ice. Probable reasons are discussed for the absence of a 100% gas release rate when the density of electric currents was below 100 mu A/cm(2).