High-Mass Analytes in FAB-MS

FAB is chiefly applied to analytes up to about m/z 3000, but significantly heavier ions are sometimes accessible. The upper limit surely has been demonstrated by the detection of [(CsI) Cs] cluster ions up to m/z 90,000. [42] In case of organic molecules, the detection of [Mh-H] , [Mh-2H] and [Mh-3H] ions of porcine 

Note The choice of the matrix is determined by the outer sphere of the analyte molecules, i.e., by y-CD in case of the above inclusion complexes. [60]Fullerene and its oxides yield poor spectra in magic bullet , but work well with less polar matrices such as NBA and NPOE. 

Example Inclusion complexes of [60]fullerene, Cgo [61], of its oxides CeoO. C60O2, and C60O3 [98], and of several cycloaddition products of the fullerene [99] 

---