On the Retention Behaviors of 13 Residual Organophosphorus Pesticides in Broccoli on Different Chromatographic Columns in Gas Chromatography

The retention of 13 organophosphorus pesticides (OPP′s) in broccoli on 4 capillary chromatographic columns with different polarities, namely DB-1, DB-5, DB-1701 and DB-35MS was studied using the gas chromatograph Agilant GC 6890 with FPD detector. As shown by the experimental results, by combining use of the DB-5 and DB-1701 columns in series, residues of the 13 OPP′s in broccoli were effectively separated and determined.