A sensitive matrix solid-phase dispersion (MSPD)/gas chromatography-electron capture detector (GC-ECD) method was developed to determine cypermethrin residues in three tissues (muscle, liver, and gill) of crucian carp. Cypermethrin was simultaneously extracted by MSPD and determined by GC-ECD. The main parameters affecting extraction yield and selectivity, such as the type of solid adsorbent material, choice of elution solvents and their volume, were investigated to obtain interferencefree extracts and quantitative cypermethrin recovery. Fortified recoveries in muscle, liver, and gill samples ranged from 84.9% to 106.1%, and relative standard deviations were \8% with fortification levels of 0.05-1 mg kg -1 . Detection limits were 1.4-2.1 lg kg -1 , and quantitation limits were 5.8-7.8 lg kg -1 . The proposed method was successfully applied to determination of cypermethrin in fish tissue samples.

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