Fragmentation of ions, especially biomolecules comprises capture of low energy electrons in high energy ion trap mass spectrometer with ring electrode to which high frequency voltage and end cap electrodes which are earthed, or vice-versa

摘要

Fragmentation of ions comprises capture of low energy electrons in a high energy ion trap mass spectrometer with a ring electrode and end cap electrodes (21, 22). A high frequency voltage is applied to the ring electrode and the end cap electrodes earthed, or vice-versa. Fragmentation of ions comprises capture of low energy electrons in a high energy ion trap mass spectrometer with a ring electrode and end cap electrodes (21, 22). A high frequency voltage is applied to the ring electrode and the end cap electrodes earthed, or vice-versa. The electrons are introduced through a slit (23, 24, 26) in the electrodes at high potential when it has reached its positive maximum value. A potential is produced in the electrons which slightly exceeds the maximum positive potential in the center of the spectrometer.