Abstract: A gas chromatography-mass spectrometry (GC-MS) method is presented for determining trifluralin residues in aquatic products in this paper. In the method, extraction with acetone, partition with n-hexane and cleanup on a Florisil solid-phase extraction column were used for sample preparation, and quantification was performed by the external standard method. Trifluralin concentration exhibited a good linearity over the range of 5－100μg/L, with a correlation coefficient of 0.99996. The detection limit of this method was 1.0μg/kg for trifluralin. The recovery rates of trifluralin in eel, corvine, India shrimp, clams and swimming crab across the spike levels of 1.0, 2.0μg/kg and 4.0μg/kg were 82.0%－93.6%. This simple and sensitive method can be applied for the determination of trifluralin residues in aquatic products.

Key words: gas chromatography-mass spectrometry (GC-MS), aquatic product, trifluralin