ABSTRACT
Objective To determine low-concentration clenbuterol in edible meat based on the solidphase extraction coupled with high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS).Method The homogenated sample was acidized to remove proteins,and purified using the liquid-liquid extraction and MCX Oasis solid prepared extraction column,then further treated with gradient elution with the mobile phase of ammonium formate (10 mmol/L and pH 3.5) and acetonitrile.The clenbuterol was completely separated on Eclipse C18 (1.8 μm,4.6×100 mm) column and detected in multiple reaction monitoring (MRM) mode.Results A good linearity was achieved for clenbuterol in the arrange of 0.01～0.2 μg/kg based on the internal standard calibration of D9-clenbuterol,with the linearity correlation coefficient greater than 0.99 and the detection limit of 0.005 μg/kg.The relative recovery of target compounds spiked in blank sample at three levels ranging from 78.8 to 114.8％,with the relative standard deviations less than 10％.Conclusion The method in this research is simple,rapid,reliable and suitable to confirm low-concentration clenbuterol in edible meat.