RELATIVE RETENTION RATIOS OF 38 CHLORINATED PESTICIDES AND POLYCHLORINATED-BIPHENYLS ON 5 GAS-LIQUID-CHROMATOGRAPHIC COLUMNS

Wide-bore capillary columns (internal diameters exceeding 0.32 mm) have gained widespread popularity since their introduction in the 1970's. These capillary columns are now considered to be packed column alternatives and can offer substantial advantages compared to packed columns. Pesticide residue mixtures and interferences from polychlorinated biphenyls (PCBs) that have been difficult to separate by conventional packed-column gas chromatography (GC) can now be more efficiently resolved using wide-bore capillary columns. Tables of relative retention data are presented for 38 commonly analyzed chlorinated pesticides and two polychlorinated biphenyls (Aroclor 1254 and 1260). Retention times relative to aldrin are calculated for three fused-silica wide-bore capillary columns and two packed columns utilizing electron capture detectors.