Patent ID: 7985950

Claim:
A method of mass spectrometry comprising: generating ions in an ion source; storing ions from the ion source in a first ion storage device, having at least an ion transport aperture, during a first ion storage time; ejecting ions from the first ion storage device to a first mass analysis device during a first ejection time period, for analysis during a first analysis time period; storing ions from the ion source in a second ion storage device, having at least an ion transport aperture, during a second ion storage time; and ejecting ions from the second ion storage device to a second mass analysis device during a second ejection time period, for analysis during a second analysis time period; wherein the ion storage devices are connected in series such that the ion transport aperture of the first ion storage device is in communication with the ion transport aperture of the second ion storage device so as to allow transfer of ions between the first and second ion storage devices, and further wherein the first analysis time period and the second ejection time period at least partly overlap.