The residues of chemical hybridizing agent（CHA） sx-1 in leaves of five Brassica napus varieties and soils were determined by high performance liquid chromatographic method（HPLC）,in which the samples were extracted with acetonitrile,then were purified by Florisil solid phase extraction column（SPE）,and then were detected by waters2695 and the external standard was used.The results showed that when added concentration was within the rage of 0.05~5.00 μg/mL,the average recoveries ranged from 76.25% to 94.59%,and the coefficient of variation ...
