Patent ID: 7038197
Filing Date: 2006-05-02
Classification: H01J

Abstract:
1. A method of mass spectrometry comprising: providing an ion source, an ion optical device downstream of said ion source, and a mass analyser downstream of said ion optical device, said mass analyser comprising an ion detector; repeatedly switching between a first mode and a second mode either said ion source, said ion optical device or the gain of said ion detector; obtaining first mass spectral data during the first mode and second mass spectral data during said second mode; interrogating said first mass spectral data; determining whether at least some of said first mass spectral data may have been affected by saturation, distortion or missed counts; and using at least some of said second mass spectral data instead of at least some of said first mass spectral data if it is determined that at least some of said first mass spectral data has been affected by saturation, distortion or missed counts.