An evaluation of electrochemical techniques applied in the determination of cypermethrin in formulations, food grains and soil

Cypermethrin, all effective synthetic pyrethroid against various pests, is studied by employing the advanced electrochemical techniques such as direct current polarography (DCP), cyclic voltammetry (CV), differential pulse po larography(DPP), controlled potential electrolysis (CPE) and millicoulometr y (MC). The compound is found to be electrochemically reducible over the pH range, the double bond carbon group, getting reduced to the saturated prod uct ill a 2e(-) process. It is found to undergo single step, irreversible, diffusion controlled, pH dependent reduction, The kinetic parameters such a s diffusion coefficient and heterogeneous forward I ate constant values ale evaluated using all techniques. The reduction behaviour of cypermethrin ha s been studied. The reduction mechanism according to the experimental data is presented. A differential pulse polarographic method is developed for th e trace determination of cypermethrin in agricultural formulations, food gr ains and soil.