TRAP FILL TIME DYNAMIC RANGE ENHANCEMENT

A method of mass and/or ion mobility spectrometry and corresponding mass and/or ion mobility spectrometer in which first and second groups of ions are analysed, the first group containing more ions than the second group, leading to first and second data sets. The results of the analysis are combined such that parts of the first data set that contain saturated and/or distorted data are replaced by corresponding parts of the second data set. The first and second groups of ions are formed by first forming an initial group of ions and forming the first and second groups of ions by extracting ions from this initial group of ions.