Shimadzu Research Laboratory (europe) Limited

Shimadzu Research Laboratory

Michael Sudakov

Li Ding

A tandem linear ion trap and time-of-flight mass spectrometer, where the ion trap has a straight central axis orthogonal to the flight path of the mass spectrometer. The ion trap comprises a set of electrodes, () at least one of the electrodes has a slit for ejecting ions towards the mass spectrometer; a set of DC voltage supplies (+V, &#x2212;V, V, V) to provide discrete DC levels and a number of fast electronic switches () for connecting/disconnecting the DC supplies to at least two of the electrodes; a neutral gas filling the ion trap and a digital controller to provide a switching procedure of ion trapping, manipulation with ions, cooling and including a state at which all ions are ejected from the ion trap towards the mass spectrometer.

Tandem ion-trap time-of-flight mass spectrometer

A quadrupole ion trap device has a field adjusting electrode located outside the trapping region adjacent the aperture in the entrance end cap electrode, and optionally adjacent the aperture in the exit end cap electrode. The field adjusting electrode(s) controls field distortion in the vicinity of the apertures. By appropriately setting the voltages on the field adjusting electrodes the efficiency and resolution of operational processes such as ion introduction, precursor ion isolation and mass scanning can be improved.

Quadrupole ion trap device and methods of operating a quadrupole ion trap device

A method of trapping ions using a quadrupole ion trap device includes applying quadrupole excitation to trapped precursor ions causing them to be driven into the ring electrode where they undergo surface induced dissociation. The resultant product ions are then trapped within the ion trap device.

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Cheshire, United Kingdom

Michael Sudakov