Abstract: For the titration reaction aA+bB=A_aB_b,where A and B is the electrogenerated titrantand the substance to be determined respectively,following formula can be derived for com-bined coulombmetric--new polarographic determination. W_B=biM_B/an_AF(t₁+h₁/(h₁-h₂)t₂)where W_B=the weight of substance to be determined, i=current used in coulombmetry,t₁,t₂ are times of electrogeneration adopted near tbe cnd point of titration for B or slightly over the cnd point for A,h₁,h₂, are corresponding heights of current peak in. new polarog-raphic determination of A or B at t₁ and t₂ respectively, M_B=formula weight of B,n_A=electron tranfer number formation of A.

Key words: Coulombmetry, New polarography, Electroanalysis