Based on the system optimization of solid phase extraction adsorbent filler type, elution solvent type and volume, a pretreatment method for 193 pesticide residues in vegetables and fruits was established. The sample is extracted by acetonitrile homogeneously, purified by C18 / PSA solid phase extraction column, eluted by acetonitrile, and the recovery rate is 71.6%-117. g%. The sample processing of this method is simple and fast, compared with other multi-residue analysis methods. Well, its sensitivity and selectivity are significantly improved, suitable for daily inspection work.
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