STUDIES ON THE VOLTAMMETRIC BEHAVIOUR OF BARBALOIN AND ITS APPLICATION

In 0.1 mol·L^-1 H₂SO₄ solution, a well-defined reduction wave of barbaloin was obtained by singlesweep oscillopolarography. The peak potential was shown to be -0.75 V (vs SCE). The peak current is proportional to the concentration of barbaloin over the range of 2.0×10^-7～6.0×10^-6 mol·L^-1. The detection limit is 2.0×10^-7 mol·L^-1. The voltammetric behaviour of the system was studied by linear sweep and cyclic voltammetry. The adsorption coefficient β was 1.91×10⁵. The interaction factor α was 1.12. The system is a reversible adsorption wave.