[Objective] The study aimed to screen out the suitable solvent strength passing column. [Method] The ratios of acetonitrile to water in solutions were set at 60∶30, 60∶20 and 60∶10. The cucumber samples were extracted by C18 columella (1 000 mg, 6 ml). The recoveries of 76 pesticides at 0.5 mg/kg level were determined by GC-MS method. [Result] The treatment with ratio of acetonitrile to water being 60∶10 had good performance in the recovery intervals of 70%-120%, 80%-110% and 85%-105% and their distribution...
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