Abstract: A Study on Alkali Metal Adduct Ions of Crown Ether Compound in Fast Atom Bombardment Mass SpectrometryLi Haiquan; Chen Nenyu; Chen Tao(National Laboratory of Applied Organic Chemistry, Lanzhou University,Lanzhou 730000, China)Abstract:Fast Atom Bombardment Mass Spectra(FABMS) of four crown ether compounds 1~4 and K+, Na+ forming adducting ions have been studied. For these adducting ions, in their FABMS, M+K+and M+Na+are intense,and may give the information about molecurlar weight exactly.Keywords: crown ether compound,K~+, Na~+,FABMS