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A dispersive solid phase extraction coupled with gas chromatography-mass spectrometry (GC-MS) method was established for the determination of trace amounts of musk ketone in aquatic products. The target analyte in the samples was extracted with acetonitrile containing 1% acetic acid, cleaned-up with the mixture of N-propyl-ethylenediamine (PSA), C18 and graphitized carbon (GCB), and analyzed by GC-MS under selected ion monitoring (SIM) mode and quantified by the external standard method. The orthogonal experiment was carried out to optimize the pre-treatment conditions. Under the optimal conditions, good linear relationship was obtained in the range of 1 - 50 microg/L for musk ketone with correlation coefficient not less than 0.999, and the limits of detection (S/N = 3) was 0.30 microg/kg. The recoveries of musk ketone in the prawn and tilapia blank samples at three spiked levels of 1.0, 2.0 and 10.0 microg/kg ranged from 91.8% to 110.6% with RSDs in the range of 2.6% - 8.4%. The method is simple, rapid and accurate, and can be used for the routine analysis of musk ketone in aquatic products.

Determination of musk ketone in aquatic products by gas chromatography-mass spectrometry with dispersive solid phase extraction