A new separation and analysis method was developed to simultaneously detect 11 phenolic compounds in edible oil based on the multi-walled carbon nanotube modified with carboxyl( MWCNTs-COOH)and high performance liquid chromatography-tandem mass spectrometry( HPLC-MS / MS). Experimental conditions,including mobile phase,addictive acids,flow rate as well as injection parameters,were fully optimized. Under the optimal conditions, 11 phenolic compounds showed good linearity over tested concentration ranges with...