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 Electron spectrometer and measurement method patent thumbnailElectron spectrometer and measurement method
An electron spectrometer includes: an energy analyzer section that energy-analyzes electrons emitted from a specimen; a micro-channel plate that amplifies the electrons analyzed by the energy analyzer section; a fluorescent screen that converts the electrons amplified by the micro-channel plate into light; a camera that photographs the fluorescent screen; and an effective range calculation section that calculates an effective range of the fluorescent screen within a camera image photographed by the camera, the effective range calculation section performing a process that acquires a plurality of the camera images photographed while causing the energy analyzer section to analyze the electrons with a different center energy, a process that converts the plurality of camera images respectively into a plurality of spectra, and a process that calculates the effective range of the fluorescent screen within the camera image based on the plurality of spectra.. .
Jeol Ltd.


 Concentric apci surface ionization ion source, ion guide, and  use patent thumbnailConcentric apci surface ionization ion source, ion guide, and use
A concentric apci surface ionization probe, supersonic sampling tube, and method for use of the concentric apci surface ionization probe and supersonic sampling tube are described. In an embodiment, the concentric apci surface ionization probe includes an outer tube, an inner capillary, and a voltage source coupled to the outer tube and the inner capillary.
Smiths Detection Montreal Inc.


 Ion source system for atmospheric pressure interface, and mass spectrometer patent thumbnailIon source system for atmospheric pressure interface, and mass spectrometer
Provided is an ion source system for an atmospheric pressure interface, comprising an atmospheric pressure ion source (1), wherein the atmospheric pressure ion source (1) is connected downstream to a vacuum ion source (2). Also provided is a mass spectrometer, using the present ion source system as an ion source.
Beijing Institute Of Technology


 Ion trap mass spectrometers patent thumbnailIon trap mass spectrometers
A method of mass spectrometry or ion mobility spectrometry is disclosed comprising: providing ions towards an ion storage region; selecting a target maximum charge desired to be stored within the ion storage region at any given time; and reducing the ion current passing to the ion storage region such that the ions entering the ion storage region do not cause the total charge within the storage region to rise above said target maximum charge. The step of reducing the ion current passing to the ion storage region comprises: temporally separating the ions according to their ion mobility in an ion mobility separator; and mass filtering the ions according to mass to charge ratio with a mass filter.
Micromass Uk Limited


 Neutron spectrometer patent thumbnailNeutron spectrometer
A neutron spectrometer that is more accurate, faster, and more-portable than conventional spectrometers includes an organic scintillator responsive to neutrons and gammas and an inorganic scintillator that captures neutrons. A processor receives signals representative of scintillations in the organic scintillator and in the inorganic scintillator and discriminates neutron signals from gamma signals.
Merrill Corporation


 Intrinsically safe circuit design for an optical system interface in a spectroscopic analyzer patent thumbnailIntrinsically safe circuit design for an optical system interface in a spectroscopic analyzer
A laser spectrometer can be operated for analysis of one or more analytes present in a combustible gas mixture. The spectrometer can include one or more features that enable intrinsically safe operation.
Spectrasensors, Inc.


 Method of measuring isotope ratio patent thumbnailMethod of measuring isotope ratio
An isotope ratio of a continuous sample is measured in an isotope ratio spectrometer. At least one sample isotope ratio is measured over a measurement time period tns, (n≧1) and a sample concentration cns is measured over at least a part of the measurement time period cns.
Thermo Fisher Scientific (bremen) Gmbh


 Image forming apparatus and dirtiness detection method patent thumbnailImage forming apparatus and dirtiness detection method
A printer includes a printing section that ejects an ink, and a spectrometer that disperses incident light. The spectrometer includes a window section that transmits the light, an optical filter device, and a light receiving section.
Seiko Epson Corporation


 Continuous operable gas purification device in an ion mobility spectrometer patent thumbnailContinuous operable gas purification device in an ion mobility spectrometer
The present disclosure discloses a continuous operable gas purification device in an ion mobility spectrometer including a housing provided with a cylinder cavity; a dry gas supply unit; a rotating barrier arranged in a radial direction of the cylinder cavity to divide it into a baking cavity and a working cavity; and a rotating mechanism. The housing is provided with a dry gas inlet and a dry gas outlet, which are communicated with the baking cavity, and a sample gas inlet and a sample gas outlet, which are communicated with the working cavity.
Nuctech Company Limited


 Color irregularity detecting device, image forming apparatus, and color irregularity detecting method patent thumbnailColor irregularity detecting device, image forming apparatus, and color irregularity detecting method
A color irregularity detecting device includes a spectrometer which includes a dispersing element which disperses light from a measurement target and a light receiving element which receives light from the dispersing element, and a color irregularity detecting section which detects color irregularity, in which the color irregularity detecting device detects color irregularity by comparing measured values (reflectance) which are results of using the spectrometer to measure three measurement wavelengths of light among light from a measurement target region in which a predetermined color is printed on a medium to reference values corresponding to the predetermined color.. .
Seiko Epson Corporation


Focusing ionization device and mass spectrometer using the same


A focusing ionization device includes a ball having a surface with a plurality of dimples and a metal needle located at one side of the ball and capable of generating corona discharge. The focusing ionization device is adapted for being disposed in a mass spectrometer in a way that the ball is located at a spray path of gaseous analytes and the metal needle is located adjacent to a sample inlet of a mass analyzer.
National Chung Hsing University


Ion focusing member and mass spectrometer using the same


An ion focusing member includes a ball having a surface with a plurality of dimples. The ion focusing member is adapted for being disposed in a mass spectrometer in a way that the ball is located at a spray path of analyte ions and located between a metal capillary and a mass analyzer.
National Chung Hsing University


Radio-frequency-free hybrid electrostatic/magnetostatic cell for transporting, trapping, and dissociating ions in mass spectrometers


Mass spectrometry cells include one or more interleaved magnetostatic and electrostatic lenses. In some examples, the electrostatic lenses are based on electrical potentials applied to magnetostatic lens pole pieces.
Oregon State University


Sample inlet and vacuum system for portable mass spectrometer


An inlet and vacuum system for a portable, or handheld, mass spectrometer. The mass spectrometer comprises three vacuum chambers, which includes two ion funnels connected in series in the first two vacuum chambers, followed by a mass spectrometer analyzer and ion detector in the third vacuum chamber.
Bayspec, Inc.


Method and the application of force to a sample for detection using an electromechanical means


The embodiments of the present invention are directed to applying intimate contact pressures to samples while undergoing atr infrared interrogation. As a general mode of operation, after a solid sample is placed on the atr element, a force actuator moves an anvil arm to apply a contact force to the sample against the atr.
Thermo Scientific Portable Analytical Instruments Inc.


Biometric sensor and biometric analysis system including the same


A biometric sensor that measures biometric information and a biometric analysis system including the biometric sensor are provided. The biometric sensor may include: a light source configured to emit light toward a region of interest of an object under examination, the light being diffused at the region of interest; a collimator that includes a though-hole and is configured to collimate the diffused light received from the region of interest; and a spectrometer configure to analyze the diffused light transmitted by the collimator..
Imec Taiwan


Mass spectrometer and liquid-metal ion source for a mass spectrometer of this type


The invention relates to a mass spectrometer comprising an ion source for producing a primary ion beam, which has a heatable ion emitter coated by a liquid metal layer essentially comprised of pure metallic bismuth or of a low-melting-point alloy containing, in essence, bismuth. A bismuth ion mixed beam can be emitted by the ion emitter under the influence of an electric field.
Ion-tof Technologies Gmbh


Ambient desorption, ionization, and excitation for spectrometry


An ion source includes a plasma generator for supplying plasma at an ionization region proximate to a sample surface. The plasma generator applies energy that may be utilized for desorbing analytes from the sample surface as well as for generating plasma by which analytes are excited or ionized.
Agilent Technologies, Inc.


System and high throughput mass spectrometric analysis of proteome samples


Disclosed herein is a system and method for analyzing a specimen containing the proteome by mass spectrometry. The system includes a protein separation module; a matrix processing module; and a mass spectrometer module.
Northwestern University


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Libs analyzer sample presence detection system and method


A libs analyzer and method includes a laser configured to produce a plasma on a sample at a focal point on the sample and a spectrometer responsive to radiation emitted from the plasma and configured to produce an output spectrum. A detector is positioned to detect low intensity pre-firing radiation produced by the laser and reflected off the sample from the focal point.
Sciaps, Inc.


Libs analyzer sample presence detection system and method


A libs analyzer, preferably handheld, includes a laser configured to produce a plasma on a sample and a spectrometer responsive to radiation emitted from the plasma and configured to produce a spectrum. A controller subsystem is configured to control energizing the laser and to analyze the resulting spectrum from each laser pulse to determine if the laser is aimed at a sample.
Sciaps, Inc.


Device and optical measurement of a target


A device and a method for optical measurement of a target, wherein the target is irradiated with radiation beam (15) and a measurement beam (27) is received from the target and detected. Commonly used absorbance, reflectance and fluorescence measurements do not provide adequate information in e.g.
Teknologian Tutkimuskeskus Vtt


Terahertz spectroscopy system and method


A terahertz spectrometer includes: a terahertz-wave emitter and a terahertz receiver elements. The terahertz wave generated by means of generating beat frequency corresponding to the difference between two rapidly tunable continuous wave lasers.
Novatrans Group Sa


Multiplexing of ions for improved sensitivity


Systems and methods are provided for multiplexed precursor ion selection using a filtered noise field (fnf). Two or more different precursor ions are selected using a processor.
Dh Technologies Development Pte. Ltd.


Method and evaluating superconducting tunnel junction detector noise versus bias voltage


A technique for characterizing the noise behavior of a superconducting tunnel junction (stj) detector as a function of its applied bias voltage vb by stepping the stj's bias voltage across a predetermined range and, at each applied bias, making multiple measurements of the detector's current, calculating their mean and their standard deviation from their mean, and using this standard deviation as a measure of the stj detector's noise at that applied bias. Because the method is readily executed under computer control, it is particularly useful when large numbers of stj detectors require biasing, as in stj detector arrays in a preferred implementation, the stj is measured under computer control by attaching it to a digital spectrometer comprising a digital x-ray processor (dxp) coupled to a preamplifier that can set the stj's bias voltage vb using a digital-to-analog converter (dac) controlled by the dxp..
Xia Llc


Evanescent wave microspectrometer


An evanescent wave microspectrometer includes a planar diopter separating two transparent media, an optical sensor with a pixel array, and disposed in the second transparent medium, and an interference device disposed such that at least a part of the interference device is in contact with evanescent waves generated at the surface of the diopter. The micro-spectrometer also includes a memory storing a map having a set of set of data grids including the optical response of said sensor for a set of quasi-monochromatic wavelengths of a calibration light source, and a calculator configured to determine the spectrum (ψ) of a test light source configured to generate evanescent waves at the surface of the diopter, on the basis of the map and the optical response of the sensor..
Universite De Technologie De Troyes


Component alignment system for optical systems


This disclosure describes a optical system design using morse taper mounted optical components for improving alignment performance and more specifically is a spectrometer design that eases alignment and improves alignment stability, both physical and temperature related, of optical components while simplifying manufacture and maintaining a compact footprint.. .
Ocean Optics, Inc.


Monolithic spectrometer


The present disclosure concerns a monolithic spectrometer (1) for spectrally resolving light (r). The spectrometer (1) comprises a body (2) of solid material having optical surfaces (3, 4, 5, 6, 8) arranged to guide the light (r) along an optical path (e1, e2, e3, e4) inside the body (2).
Nederlandse Organisatie Voor Toegepast-natuurwetenschappelijk Onderzoek Tno


Downhole measurement while drilling tool with a spectrometer and operating same


A pulser assembly for a downhole measurement-while-drilling tool comprises a motor subassembly and an electronics subassembly electrically coupled to the motor subassembly. The motor subassembly comprises a motor, a motor subassembly housing that houses the motor, a spectrometer inside the motor subassembly housing and a driveshaft extending from the motor out of the motor subassembly housing for coupling with a rotor of a fluid pressure pulse generator.
Evolution Engineering Inc.


Mass spectrometer


A mass spectrometer includes: an ionization unit configured to ionize an analyte gas; a filter unit configured to allow passage of only a target ion which is a component of the analyte gas ionized in the ionization unit and which has a specific mass-to-charge ratio; and an ion detection unit configured to detect an ion detection value based on the target ion having passed through the filter unit, wherein the ion detection unit includes a faraday electrode which includes an electrode portion disposed along a centerline of the filter unit and a bottom electrode provided at a position downstream of the electrode portion in a flow of the target ion, the electrode portion and the bottom electrode being connected to each other, a secondary electron multiplier provided to face the electrode portion with the centerline located therebetween, and a blocking portion connected to the bottom electrode.. .
Canon Anelva Corporation


Open trap mass spectrometer


An open electrostatic trap mass spectrometer is disclosed for operation with wide and diverging ion packets. Signal on detector is composed of signals corresponding to multiplicity of ion cycles, called multiplets.
Leco Corporation


Flow through ms3 for improved selectivity


Systems and methods are provided for selecting and fragmenting a first precursor ion in an ms3 experiment. One or more first excitation parameters are calculated that define a first dipole excitation using a processor.
Dh Technologies Development Pte. Ltd.


Chromatograph mass spectrometer


A chromatograph mass spectrometer including an optimum gas pressure search controller that performs an mrm measurement for a target compound while changing a collision-gas pressure, investigates an optimum collision-gas pressure giving a highest signal strength based on the measured result, and stores the same gas pressure for each compound in a compound-related information storage section. When a target compound is specified in a simultaneous multicomponent analysis, a control sequence determiner reads the optimum collision-gas pressure and retention time information corresponding to the specified compound from the storage section, prepares a control sequence which sets the gas pressure in a collision cell at the optimum gas pressure at the timing where each compound is eluted, and stores the sequence in a control sequence storage section..
Shimadzu Corporation


Libs analysis system


A handheld libs spectrometer includes an optics stage movably mounted to a housing and including a laser focusing lens and a detection lens. One or more motors advance and retract the optics stage, move the optics stage left and right, and/or move the optics stage up and down.
Sciaps, Inc.


Spectrometry system with decreased light path


A spectrometer comprises a plurality of isolated optical channels comprising a plurality of isolated optical paths. The isolated optical paths decrease cross-talk among the optical paths and allow the spectrometer to have a decreased length with increased resolution.
Verifood, Ltd.


Libs analysis system


A handheld libs spectrometer includes an optics stage movably mounted to a housing and including a laser focusing lens and a detection lens. One or more motors advance and retract the optics stage, move the optics stage left and right, and/or move the optics stage up and down.
Sciaps, Inc.


Dual coupler device, spectrometer including the dual coupler device, and non-invasive biometric sensor including the spectrometer


Provided are a dual coupler device configured to receive lights of different polarization components, a spectrometer including the dual coupler device, and a non-invasive biometric sensor including the spectrometer. The dual coupler device may include, for example, a first coupler layer configured to receive a light of a first polarization component among incident lights.
Imec Vzw


Additive manufacturing apparatus and method


This invention concerns a laser solidification apparatus for building objects by layerwise solidification of powder material. The apparatus including a build chamber containing a build platform, a device for depositing layers of powder material on to the build platform, an optical unit for directing a laser beam to selectively solidify areas of each powder layer and a spectrometer for detecting characteristic radiation emitted by plasma formed during solidification of the powder by the laser beam.
Renishaw Plc


Method and mass analysis utilizing ion charge feedback


A method of mass analysis and a mass spectrometer are provided wherein a batch of ions is accumulated in a mass analyser; the batch of ions accumulated in the mass analyser is detected using image current detection to provide a detected signal; the number of ions in the batch of ions accumulated in the mass analyser is controlled using an algorithm based on a previous detected signal obtained using image current detection from a previous batch of ions accumulated in the mass analyser; wherein one or more parameters of the algorithm are adjusted based on a measurement of ion current or charge obtained using an independent detector located outside of the mass analyser.. .
Thermo Fisher Scientific (bremen) Gmbh


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Multireflection time-of-flight mass spectrometer


A method of reflecting ions in a multireflection time of flight mass spectrometer is disclosed. The method includes guiding ions toward an ion mirror having multiple electrodes, and applying a voltage to the ion mirror electrodes to create an electric field that causes the mean trajectory of the ions to intersect a plane of symmetry of the ion mirror and to exit the ion mirror, wherein the ion are spatially focussed by the mirror to a first location and temporally focused to a second location different from the first location.
Thermo Fisher Scientific (bremen) Gmbh


Mass spectrometers comprising accelerator devices


A method of mass spectrometry is disclosed comprising providing a flight region for ions to travel through and a detector or fragmentation device. A potential profile is maintained along the flight region such that ions travel towards the detector or fragmentation device.
Micromass Uk Limited


Interface for ion source and vacuum housing


A mass spectrometer or ion mobility spectrometer is disclosed comprising: an ion block (2) for receiving ions; a heater (8) for heating the ion block (2); a vacuum housing (6); and an interface block (4) arranged between the ion block (2) and the vacuum housing (6); wherein the interface block (4) is formed from a polymer. The polymer interface block (4) inhibits the heat transfer from the ion block (2) to the vacuum housing (6) and also electrically isolates the ion block (2) and vacuum housing (6).
Micromass Uk Limited


Automated cleanliness diagnostic for mass spectrometer


A mass spectrometer or ion mobility spectrometer is disclosed comprising means for detecting a blockage in an inlet orifice arranged between an ion source and a vacuum chamber. The blockage is detected as a result of a reduction in pressure within the vacuum chamber.
Micromass Uk Limited


Gasket seal for a mass spectrometer


A gasket seal for a mass spectrometer is disclosed. The gasket seal comprises a membrane having an outer profile and an inner profile and one or more protrusions.
Micromass Uk Limited


Ion inlet assembly


An ion inlet assembly for connecting to a mass spectrometer housing is disclosed comprising a sampling limiting body having a sampling orifice. The sampling limiting body comprises a nickel disk wherein the disk and sampling orifice are made or formed by an electroforming process..
Micromass Uk Limited


Gas diffuser ion inlet


In some embodiments, a gas diffuser for use in a mass spectrometer is disclosed that can provide a controlled expansion of an ion-containing gas so as to reduce gas velocity for entry into subsequent stages of the mass spectrometer, e.g., a mass analyzer. In some embodiments, the controlled expansion of the gas is provided by flowing the gas through a channel whose cross-sectional area change, e.g.
Dh Technologies Development Pte.ltd.


Sample collection wand comprising an inductively coupled heater


A spectrometry apparatus comprising a spectrometer; a port adapted to couple a sample collection wand to the apparatus to present a sample carried by the wand to an inlet of the spectrometer; and an inductive coupler adapted to couple, via a time varying h-field, with a heater of said sample collection wand to provide electrical power for heating said sample.. .

Mass spectrometer


Apparatus for a mass spectrometer is disclosed comprising an ion source, a heater for heating a gas flow to the ion source, a temperature sensor for monitoring the temperature of the heater, and a control system. The control system is arranged and adapted to determine a flow rate of the gas flow by monitoring the power supplied to the heater and the temperature of the heater..
Micromass Uk Limited


Ion transfer


An ion transport device can include a plurality of pole rod pairs arranged in parallel, and a controller. The controller configured to can be configured to apply voltages in a repeating voltage pattern of to the pole rod pairs thereby creating a plurality of potential wells capable of capturing ions, and move the repeating voltage pattern along the pole rod pairs to move captured ions along the ion transport device.
Thermo Finnigan Llc


Systems and methods for using interleaving window widths in tandem mass spectrometry


Systems and methods are provided for analyzing a sample using overlapping measured mass selection window widths. A mass range of a sample is divided into two or more target mass selection window widths using a processor.
Dh Technologies Development Pte. Ltd.


Parsing events during ms3 experiments


Systems and methods are provided for reducing the time period of a cid event of an ms3 experiment and making the overall fragmentation event more generic. A cid event of an ms3 experiment performed on a sample by a mass spectrometer is divided into two time periods using a processor.
Dh Technologies Development Pte. Ltd.


Multidrug analysis in urine by liquid chromatography-tandem mass spectrometry


A fast and reliable method for the determination of multiple drugs and their metabolites belonging to different chemical and toxicological class from a biological sample is provided. The method involves mixing of biological sample with internal standards which does not require sample extraction or derivatization prior to analysis.
Castle Medical, Llc


Use of windowed mass spectrometry data for retention time determination or confirmation


A scan of a separating sample is received by a mass spectrometer at each interval of a plurality of intervals. The spectrometer performs at each interval one or more mass spectrometry scans.
Dh Technologies Development Pte. Ltd.


Fast-switching dual-polarity ion mobility spectrometry


Systems and methods disclosed provide for methods of managing polarity switching in an ion mobility spectrometer, and provide for management of the repelling grid voltage, the gating grid voltage, and the fixed grid voltage during polarity switching. Systems and methods also provide for the management of the effect of dielectric relaxation in an insulator proximal to the collector, and provide for a preamplifier coupled to the collector including a switch, and a method of managing the collector output including the switch.
Smiths Detection Montreal


Trapping ion mobility spectrometer with parallel accumulation


The invention relates to the operation of trapping ion mobility spectrometers based on pushing ions by a gas flow against a counter-acting electric dc field barrier, preferably in combination with a mass analyzer as ion detector. The invention provides an additional rf ion trap upstream of the trapping ion mobility spectrometer, wherein the rf ion trap is operated as an accumulation unit in parallel with the trapping ion mobility spectrometer such that a first group of ions can be analyzed in the trapping ion mobility spectrometer while a second group of ions from an ion source are simultaneously collected in accumulation unit..
Bruker Daltonik Gmbh


Spectroscopic characterization of seafood


A method and apparatus for field spectroscopic characterization of seafood is disclosed. A portable nir spectrometer is connected to an analyzer configured for performing a multivariate analysis of reflection spectra to determine qualitatively the true identities or quantitatively the freshness of seafood samples..
Viavi Solutions, Inc.


Multi-functional fiber optic fuel sensor system having a photonic membrane


A fuel sensing system utilizes a fiber optic sensor comprising a membrane made of a direct band gap semiconductor material (such as gallium arsenide) that forms an optical cavity with an optical fiber inside a hermetically sealed sensor package located at the bottom of a fuel tank. The optical fiber inside the fuel tank is not exposed to the fuel.
The Boeing Company


Mobile cellular spectroscopy


The present invention discloses a spectrometer apparatus comprising a mobile device including an integrated camera, having a camera lens and an image sensor. The camera lens is located within a body of the mobile device that comprises a detachable housing coupled to the body of the mobile device.
International Business Machines Corporation


Chamber seal for mass spectrometer


A mass spectrometer is disclosed comprising a first component, an annular vacuum chamber seal and a second component. The first component has a groove.
Micromass Uk Limited


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Time-of-flight mass spectrometry using multi-channel detectors


A time-of-flight mass spectrometer (tof-ms) utilizes a multi-channel ion detector to detect ions traveling in separate flight paths, spatially dispersed along a drift axis and/or a transverse axis, in a flight tube of a tof analyzer. The ion beams may be dispersed by drift energy, deflection along the drift and/or transverse axis, ion mass, or a combination of two or more of the foregoing.
Agilent Technologies,inc.


Miniature ion source of fixed geometry


A mass spectrometer is disclosed comprising an atmospheric pressure interface comprising a gas cone having an inlet aperture, wherein the gas cone has a first longitudinal axis arranged along an x-axis and an electrospray ion source comprising a first capillary tube having an outlet and having a second longitudinal axis and a second capillary tube which surrounds the first capillary tube. The mass spectrometer further comprises a desolvation gas supply tube and a first device arranged and adapted to supply an analyte liquid via the first capillary tube so that the liquid exits the outlet of the first capillary tube at a flow rate >200 μl/min.
Micromass Uk Limited


Pulsed ion guides for mass spectrometers and related methods


An ion guide generates a radio frequency (rf) field to radially confine ions to an ion beam along a guide axis as the ions are transmitted through the ion guide. The effective potential of the rf field includes an alternating series of barriers and wells.
Agilent Technologies, Inc.


Method and transporting samples in a mass spectrometer


A sample plate handling system for a time-of-flight mass spectrometer includes a transport chamber and a mass spectrometer chamber that is mechanically coupled to transport chamber. A vacuum chamber is coupled through a bypass valve to the transport chamber.
Virgin Instruments Corporation


Data independent acquisition of product ion spectra and reference spectra library matching


Systems and methods are disclosed for detecting compounds in a sample using a tandem mass spectrometer. A sample comprising a plurality of detectable compounds that have been separated in time over a time interval is introduced into a tandem mass spectrometer.
Eth Zürich


Rf-only detection scheme and simultaneous detection of multiple ions


A mass spectrometer apparatus and method for conducting simultaneous ms/ms analysis including: a device to select a precursor ion having a specified m/z; a gas-filled collision cell; an rf-only multipole mass spectrometer, the mass spectrometer having a generator attached thereto for generating at least two auxiliary ac fields in the rf-only multipole mass spectrometer; a gate for providing a repulsive dc or ac barrier downstream to an exit of the rf-only multipole mass spectrometer; an ion detection system situated downstream from the dc or ac barrier for measuring an ion current derived from ions that overcome the repulsive barrier. The mass spectrometer may also be configured so that each of the auxiliary ac fields are generated by the introduction of individual auxiliary ac frequencies and each frequency is amplitude modulated at a unique frequency..
Dh Technologies Development Pte. Ltd.


Fragment ion mass spectra measured with tandem time-of-flight mass spectrometers


The present invention provides a method for acquiring fragment ion mass spectra with a time-of-flight mass spectrometer, whereby mixed mass spectra with fragment ions of different parent ion species are acquired and compared with each other in such a way that the signals of those fragment ions which originate from the same parent ion species are determined. The time-of-flight mass spectrometer contains an ion source, a flight path, a reflector and an ion detector.
Bruker Daltonik Gmbh




Spectrometer topics:
  • Spectrometer
  • Ion Mobility
  • Mass Spectrometer
  • Spectrometry
  • Longitudinal Axis
  • Relaxation
  • Mass Spectrometry
  • Coordinates
  • Downstream
  • Chromatograph
  • Quantitative


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