The anodic voltammetric behavior of ethacridine (FAD) in the presence of various electrolytes was studied by using linear potential sweep voltammetry, differential-pulse voltammetry and cyclic voltammetry at a glassy carbon electrode. In the medium of 0. 1 mol/L NaOH solution, an oxidative peak of ethacridine was obtained. The peak potential is at about 0.40 V(vs. Ag/AgCl). The peak current is linearly increased with the concentration of ethacridine over the range of 0. 05- 80 mg/L. The method has been used...