Abstract: An IMS device is provided that includes at least one surface, first and second pluralities of electrodes disposed on the surface, and an ion path having first and second accumulation regions and a separation region. The IMS device is configured to receive, guide, temporally separate, and discharge ions. Each accumulation region is configured to switch between accumulation and release states in which ions are accumulated and released therefrom, respectively. The separation region is positioned downstream of the first accumulation region and configured to temporally separate ions based on mobility. The first accumulation region is synchronized with a downstream mass filter while the second accumulation region is dependent upon the state of a gating element, which is positioned downstream of the IMS device and configured to control the flow of ions to a mass analyzer. A method in accordance with the foregoing is also provided.