A dual quadrupole ion trap mass spectrometer

Two quadrupole ion traps are used to carry out a mass spectrometer. The fir st concerns ion preparation with possible mass selection functions. The sec ond is used as a mass analysis cell to obtain the secular frequency of simu ltaneously confined ions. After ion ejection, the secular frequencies are c omputed from the evolution of time-of-flight (TOF) histograms. Comments and results concerning the ion preparation are given. Then, the metrological p arameters of the mass spectrometer prototype are examined: amplitude calibr ation, visibility, resolution, and mass range. (Int J Mass Spectrom 190/191 (1999) 59-68) (C) 1999 Elsevier Science B.V.