ENANTIOMERIC RESOLUTION OF PYRETHROIDS BY HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY WITH DIODE-LASER POLARIMETRIC DETECTION

Liquid chromatographic separation of the pyrethroid insecticides, bife nthrin and fenpropathrin, has been investigated with various achiral a nd chiral stationary phases. The identification of enantiomers of fenp ropathrin and bifenthrin has been carried out by using two detectors i n high-performance liquid chromatography: a UV spectrometer and a diod e-laser polarimeter. Optimization of the mobile phase has been perform ed dealing regard to analyte resolution and polarimetric signal values .