A polarographic method has been developed for the determination of zin
eb and maneb in 0.1 M KCl and 2.0 M H2SO4 in 40% acetonitrile-formamid
e (4 : 1) at d.m.e. Each produces well-defined diffusion-controlled re
versible anodic waves. The method has been applied for their determina
tion in commercial samples.