| 摘要 |
An ion mobility spectrometer (2) is disclosed wherein the potential difference between the exit region of an ion trap (1) arranged upstream of the ion mobility spectrometer (2) and the entrance region to the ion mobility spectrometer (2) is varied temporally with time in order to optimise the transmission of ions from the ion trap (1) into the ion mobility spectrometer (2) so as to avoid fragmentation of the ions. |
