Abstract: A Study on Unsaturated Fatty Acids in Fish Oil by EIMS and CID Spectroscopy of 2-AlkenylbenzoxazolesDong Zhenwen;Sun Zhuolian;Cao Zhongmin(Dalian University of Technology,Dalian 116012,China)Fang Yuan(Dalian Center Hospital,Dalian 116033,China)Received Abstract:In this paper o-aminophenol was used to derivatize the unsaturated fatty acid so as to fix the double bond whose positions were determined by GC/EIMS and CID/MIKE spectroscopy.It was found that the amount of ω-3 PUFAs in fish oil differs with the kinds of fish and changes with the time of storage.Keywords:fatty acid,collision induced dissociation,electron impact,mass spectrometry