Abstract: A gas chromatography (GC) method was established for determining trifluralin residues in aquatic products in this study. The sample preparation procedure involved homogenization, acetone extraction, n-hexane partition (liquid-liquid extraction) and cleanup on a Florisil solid-phase extraction column before GC analysis. The quantification was performed by external standard method. The GC method showed good linear relationship over the concentration range of 0.5–100 ng/mL. The limit of quantification was 1.0 ng/g. The recovery rates of trifluralin from eel, crab, clams, crucian and shrimp when spiked at 1.0, 2.0 ng/g and 10.0 ng/g were 74.8%–99.7%, respectively. This method was simple, sensitive and accurate, and therefore could meet the requirements for the determination of trifluralin residues in aquatic products.

Key words: gas chromatography (GC), aquatic product, trifluralin