POLAROGRAPHIC-BEHAVIOR OF SOME S-TRIAZIUE HERBICIDES AND THEIR DETERMINATION BY ADSORPTIVE STRIPPING VOLTAMMETRY AT THE HANGING MERCURY DROP ELECTRODE

The electrochemical behaviour of six triazine herbicides (atrazine, te rbutylazine, desmetryne, prometryne, terbutryne and methoprotryne) was studied by fast scan differential pulse voltammetry (FSDPV) at a stat ic mercury drop electrode and by constant potential coulometry. The ad sorption of these compounds at the mercury electrode was employed for their determination by adsorptive stripping voltammetry (AdSV) in Brit ton-Robinson buffers. The detection limits calculated from regression analyses ranged between 0.1 and 0.9 mu g/l. Preconcentration (solid ph ase extraction on a C18 column) was used for the determination of very low contents in water samples. The recovery was 97-99.6%.