Abstract:
An ion guide array is disclosed comprising a first ion guide section and a second ion guide section and optionally further ion guide sections. Each ion guide section may comprise a plurality of electrodes having an aperture through which ions are transmitted in use. A transfer section is arranged at the exit of the first ion guide section and ions are transmitted radially from the first ion guide section into the second ion guide section. The electrodes in the transfer section may have a radial aperture enabling ions to be transmitted radially from the first ion guide section to the second ion guide section.
Abstract:
The present invention generally relates to a low temperature plasma probe for desorbing and ionizing at least one analyte in a sample material and methods of use thereof. In one embodiment, the invention generally relates to a low temperature plasma probe including: a housing having a discharge gas inlet port, a probe tip, two electrodes, and a dielectric barrier, in which the two electrodes are separated by the dielectric barrier, in which application of voltage from a power supply generates a low temperature plasma, and in which the low temperature plasma is propelled out of the discharge region by the electric field and/or the discharge gas flow.
Abstract:
A personalized mass spectrometer system is described. By fabricating analyzer components on a module and including with that module an identifier for that module, it is possible to uniquely associate a user or task with one or more modules. The module is removably receivable within a housing and can be replaced with another module if so required.
Abstract:
The invention relates to a method and apparatus for the fragmentation of large molecules, especially biopolymers. The invention consists in reacting analyte ions with excited or radical neutral particles, whereby, at least in the case of bombardment of analyte ions with helium atoms from an FAB generator, a new type of fragmentation occurs which strongly resembles fragmentation by electron capture (ECD). The reactions may be performed in magnetic ion traps (ion cyclotron resonance cells, ICR), in RF ion traps according to Wolfgang Paul, in RF ion guides, or in free beams of analyte ions or neutral particles.
Abstract:
An electrostatic trap such as an orbitrap is disclosed, with an electrode structure. An electrostatic trapping field of the form U′(r,φ,z) is generated to trap ions within the trap so that they undergo isochronous oscillations. The trapping field U′(r, φ,z) is the result of a perturbation W to an ideal field U(r, φ,z) which, for example, is hyperlogarithmic in the case of an orbitrap. The perturbation W may be introduced in various ways, such as by distorting the geometry of the trap so that it no longer follows an equipotential of the ideal field U(r, φ,z), or by adding a distortion field (either electric or magnetic). The magnitude of the perturbation is such that at least some of the trapped ions have an absolute phase spread of more than zero but less than about 2π radians over an ion detection period Tm.
Abstract:
A personalised mass spectrometer system is described. By fabricating analyser components on a module and including with that module an identifier for that module, it is possible to uniquely associate a user or task with one or more modules. The module is removably receivable within a housing and can be replaced with another module if so required.
Abstract:
Systems and methods for calculating ion flux. In one embodiment, a mass spectrometer includes an ion source for emitting a beam of ions from a sample through a plurality of pulses during an analysis period, and a detector positioned downstream of said ion source. A clock is provided which is configured to determine a repeatable series of bins, wherein each bin in the repeatable series will correspond to a corresponding pulse time segment in every pulse. Additionally a controller is provided which is operatively coupled to the detector and to the clock and configured to determine the total number of pulses during the analysis period. The controller is further configured to determine for at least one bin in the repeatable series, the number of corresponding pulse time segments in which no ion impact was detected during the analysis period. The controller is also configured to calculate the ion flux corresponding to the at least one bin and wherein said ion flux is calculated to be correlated to the probability of not detecting an ion impact during pulse time segments which correspond to the at least one bin in the repeatable series.
Abstract:
A data processing engine for an automated mass spectrometry system is provided that identifies analyte and spike peak locations in spectral data based upon mass spectrometer tunings and solution identities. The data processing engine calculates analyte concentrations based upon spectral responses at the identified peak locations.
Abstract:
Mass spectrometer systems for measuring mass/charge ratios of analytes are described. A mass spectrometer system includes a vacuum flange, a PCB base plate coupled to the vacuum flange, and an ion optic assembly coupled to the PCB base plate. The PCB base plate may include signal-processing electronics. The system may include an electrical cable coupled to the PCB base plate for supplying power, control, and I/O to the ion optic assembly and the signal processing electronics. Alternatively, a mass spectrometer system includes a PCB base plate and an ion optic assembly. The PCB base plate has a sealant portion and an electrical portion. The ion optic assembly is coupled to the electrical portion. The system may include a vacuum housing for enclosing the ion optic assembly. The vacuum housing is coupled to the sealant portion of the PCB base plate for sustaining a vacuum while the system is in operation.
Abstract:
A mass sensor, in an exemplary embodiment, includes a housing that includes a first plate, a second plate, and a center portion positioned between the first and second plates. The mass analyzer also includes an ionizer a double focusing mass spectrometer, and an ion detector. The ionizer, the double focusing mass spectrometer, and the ion detector are located in a cavity in the housing. The double focusing mass spectrometer includes an electric sector energy analyzer that includes a first element located on an inside surface of the first plate, and a second element located on an inside surface of the second plate. The first and second elements are substantially concentric and congruent and have a circular arc shape. Each first and second element include a first boundary electrode, a second boundary electrode, and a continuous resistive material extending between the first and second boundary electrodes.