LOW-VOLTAGE ON-RESONANCE ION SELECTION AND STORAGE - AN ALTERNATIVE TO QUADRUPOLAR AXIALIZATION FOR FTMS

A new alternative to quadrupolar axialization for ions trapped within a cubic Fourier transform mass spectrometer cell is presented. This me thod, low-voltage on-resonance excitation, requires no electronic swit ching hardware, as is necessary for the quadrupolar axialization techn ique. However, it yields equivalent ion selection performance, both fo r single-and broad-band ion selection, as is demonstrated with spectra for a number of poly(ethylene glycol) samples, gramicidin S, and a bo vine insulin b-chain sample.