IMPROVED ION MOBILITY SPECTROMETER

摘要

A method of analysing ions by ion mobility separation is disclosed. The method comprises controlling the amount of charge within an ion trap (3) and then pulsing the ions from the ion trap (3) into an ion mobility separator (5). This enables the charge injected into the ion mobility separator (5) to be controlled and hence prevents space-charge interactions between the ions from distorting the ion mobility peaks detected by the detector (7).