Concentrated apple juice (CA J) has become an economically important food product in China,where export of CAJ accounts for nearly 50% of the world export volume.However,the application of organophosphorus pesticides (OPPs) has resulted in pesticide residues in fruit and deterioration of CAJ quality.The objective of present study was to investigate the effect of pulsed electric field (PEF) on the dissipation of OPPs in apple juice.Apple juice (13°Brix) spiked with methamidophos and chlorpyrifos (2-3 mg/1 of each compound) was treated by pulsed electric fields (PEF),and pesticide residues were quantified by gas chromatography with flame photometric detection (GC-FPD).Results showed that electric field strength (8-20 kV/cm) and pulse number (6-26 pulses) have significant effects on the degradation of methamidophos and chlorpyrifos,and an increase in both pulse number and electric field strength could speed the degradation of methamidophos and chlorpyrifos.