Simultaneous Determination of 11 Appetite Suppressants in Weight-loss Functional Foods by Accelerated Solvent Extraction-High Performance Liquid Chromatography Tandem Mass Spectrometry

An analytical method based on high performance liquid chromatography tandem mass spectrometry has been developed for the determination of 11 appetite suppressants( fenfluramine,phenylpropanolamine,sibutramine,sertraline,rimonabant,bupropion,citalopram,fluoxetine,benfluorex,topiramate,zoni-samide). Various weight-loss functional foods were extracted under accelerated solvent extraction and separated on Waters Atlantis T3( 150 mm × 2. 1 mm,3 μm) column. The analysis was carried out on HPLC-MS/MS by electrospray ionization using multiple reaction monitoring. Identification was achieved by the retention time and the ion ratio,quantification was done by the external standard curves. The limits of detection for the appetite suppressants were 0. 05 -4. 0 mg/kg. The mean recoveries at the three spiked levels( low,middle,high) were 78. 3% -103. 6% ,with the intra-day precision less than 12% and the inter-day precision less than 15%. The method is reliable,sensitive,reproducible,and adapts to the determination of the appetite suppressants in different weight-loss functional foods.