Abstract: Detection of Mesocarb in Human Urine by on-line HPLC/ES/MSZhu Shaotang;Yang Shumin (China Doping Control Centre,National Research institute of Sports Medicine,l Anding Road,Beijing 100029,China)Abstract:A reliable method for detection of mesocarb,a psychostimulator which may be misused by athletes and forbidden by international Olympic Committee,is developed on HPLC/ES/MS.The condition of separation and ionization etc for mesocarb was optimized.Keywords:mesocarb,psychostimulator,electrospray