High-frequenry titration curves are discussed for various methods of experimental determination(the Q-meter, Z-meter and F-meter methods), using equivalent circuits for C-type and L-type titrating cells.It has been found that for the cases of L-type cell with Q-determination and C-type cell with Z- or F-determination, the quantity measured in the course of titration changes monotonously with the increase of conductivity of the solution.In these cases, the high-frequency titration curve should be similar in shape to that obtained in an ordinary conductometric titration.Two mistakes appearing in literature are here pointed out.