Analysis of acidic photosystem II—Interacting herbicides in lake and river water by capillary electrophoresis

Summary The separation of cyanophenolic (ioxynil and bromoxynil) photosystem II-interacting herbicides and mecoprop in surface water extracts was obtained on a poly(vinyl alcohol)—coated capillary in 75 mM acetate buffer, pH 6, at 16 kV applied voltage. Styrene-divinyl benzene packed cartridges were used for solid phase extraction of the real surface water samples at neutral pH. To increase method sensitivity different injection techniques, namely hydrodynamic, electrophoretic and field—amplified sample injection (FASI), were compared.