The electric and spectral properties of diaphragm discharge excited at a frequency of 50 Hz in a sodium sulfate solution were studied. It was found that the emission of hydrogen atoms, OH radicals, and Na atoms is characterized by an initial spike coinciding with a current pulse and afterglow that lasts over a few hundred microseconds, which can be associated with gas discharge-induced chemiluminescence in the solution. Preliminary estimates of the discharge characteristics have been made.