201 results about "Mass analysis" patented technology

A hybrid inductively coupled plasma mass spectrometer (ICP-MS) system is disclosed for simultaneous elemental and molecular analysis in positive and negative polarities. It includes an ICP torch that generates plasma with a buffer gas, producing both positively and negatively charged ions from a sample. Positioned between the sampler and skimmer, an insert with a defined geometry forms a reaction chamber. Various embodiments feature multiple apertures for pressure control, a rotatable disk for aperture regulation, a slider gate for pressure adjustment, a circular gate with adjustable radial apertures, and an inlet for introducing gases, reagents, dopants, or analytes. These components enable precise pressure modulation, optimizing performance for dual-polarity mass spectrometry. The system enhances analytical flexibility by facilitating controlled ion reactions, improving sensitivity and specificity for both elemental and molecular applications. This innovation expands ICP-MS functionality, supporting diverse scientific and industrial applications requiring high-precision mass analysis.

The invention discloses a coal body compression mechanical test acoustic emission signal processing method and system, and relates to coal rock mass analysis. The method comprises the steps that under the supercritical water coupling effect condition, an acoustic emission original data set of the whole coal body uniaxial compression damage process is collected; respectively carrying out time domain processing, frequency domain conversion and spatial positioning calculation on the original data set, and outputting a time domain characteristic parameter, a frequency domain characteristic parameter set and a spatial position parameter set; and performing data fusion on the time domain characteristic parameter set, the frequency domain characteristic parameter set and the spatial position parameter set, establishing a multi-dimensional characteristic data matrix through time synchronization, and analyzing acoustic emission signal laws of different damage stages of the coal body under the supercritical water coupling effect. Aiming at the low recognition precision of the coal body damage stage under the supercritical water coupling effect, the recognition precision is improved by performing time domain processing, frequency domain conversion, spatial positioning calculation and the like on an acoustic emission original data set.

A trace of intensity versus time values is received for a series of samples produced by a mass spectrometer. Also, a series of ejections times corresponding to the series of samples produced by a sample introduction system is received. A series of expected peak times corresponding to the series of ejection times are calculated using a known delay time from ejection to mass analysis. At least one isolated peak of the trace is identified using the series of expected peak times. A peak profile is calculated by fitting a mixture of at least two different distribution functions to the at least one isolated peak. For at least one time of the series of expected peak times, an area of a peak at the one time is calculated by fitting the peak profile to the trace at the one time and calculating an area of the fitted peak profile.

Systems and methods are disclosed for automated method parameter configuration for differential mobility separations. As non-limiting examples, various aspects of this disclosure provide receiving a sample in an open port interface; transferring the sample to an ionization source; ionizing the transferred sample; introducing the ionized sample into a mass spectrometer; mass analyzing the ionized sample to produce an initial mass analysis result; determining a peak width of the initial mass analysis result; and determining a dwell time for subsequent measurements based on the determined peak width, a pre-defined number of data points across subsequent mass analysis peak widths, and a number of different analytes to be assessed for the sample. The sample may be diluted and transferred to the ionization source by a sample introduction apparatus selected from a group including an acoustic droplet ejector (ADE), a pneumatic ejector, a piezoelectric ejector, and a hydraulic ejector.

Systems / techniques are provided for facilitating mass analyzer calibration via reinforcement learning. In various embodiments, a system can predict, via execution of one or more reinforcement learning neural networks on present-time state data of a mass analyzer of a scientific instrument, what adjustments to one or more operational parameters of the mass analyzer would cause the mass analyzer to approach a calibrated state, wherein the one or more operational parameters include an electrode voltage of the mass analyzer or a timing control of the mass analyzer. In various aspects, the system can modify the one or more operational parameters based on the adjustments, thereby causing the mass analyzer to approach the calibrated state.

The application discloses a quality analysis method for extracting effective components of Gastrodia elata by using HDES, and comprises the following steps: (1) synthesizing HDES by using L-menthol and DL-lactic acid; (2) adding the HDES in step (1) into Gastrodia elata medicinal material powder, stirring to extract effective components, centrifuging and diluting the obtained mixture after the extraction is completed, obtaining a test sample solution, and performing chromatographic analysis to determine the content of the effective components; (3) detecting the quality indexes of the test sample solution in step (2); and (4) analyzing the quality of Gastrodia elata by using a chemometrics analysis method. The extraction method is green, simple, fast and high in extraction efficiency, and is favorable for the extraction of effective components in medicine and food homologous medicinal materials.

The invention relates to the technical field of mass spectrometers, and discloses an analytical instrument based on glow discharge and quadrupole mass spectrometry combination, which comprises an ion source, an ion transmission system and an ion separator, wherein the ion source is a glow discharge ion source; the ion separator is a quadrupole rod mass analyzer, and the quadrupole rod mass analyzer comprises four electrodes which are arranged in parallel. Compared with an existing analytical instrument, the glow discharge ion source can directly analyze a solid sample without being pretreated into a solution, and compared with an inductively coupled plasma source, the glow discharge ion source is small in matrix effect and especially suitable for high-salt and high-carbon samples; the quadrupole rod mass analyzer is simple in structure, small in size, low in cost, especially suitable for commercialized popularization and high in scanning speed.

A method of mass spectrometry comprising: a) separating a sample in a separator device and then mass analysing the sample so as to obtain a list of sample peaks in which a mass to charge ratio for each peak is associated with a retention time in the separator device; b) providing a list of library peaks in which a mass to charge ratio for each peak is associated with a retention time in a separator device; c) dividing the list of sample peaks, according to retention time, into multiple sample peak sub-lists, and dividing the list of library peaks, according to retention time, into multiple library peak sub-lists; d) peak- matching at least a first peak in a first of the sample peak sub-lists with at least a first respective peak in a first of the library peak sub-lists so as to obtain at least a first pair of matched peaks; e) determining an error in the mass to charge ratio of the first peak in the first sample peak sub-list based on the mass to charge ratios of the peaks in the first pair of matched peaks; and f) adjusting the mass to charge ratio of at least the first peak in the first sample peak sub-list using said error in mass to charge ratio so as to provide an adjusted first sample peak sub-list.

An apparatus fortime-of-flight, TOF, tandem mass spectrometry comprises an ion source for providing precursor ions, a linear ion trap comprising a set of electrodes configured for receiving the precursor ions into the ion trap. A voltage source is configured for applying to the set of electrodes a trapping voltage(s) configured to generate an axial trapping potential field forming a potential barrier to axially trap the received precursor ions within the linear ion trap, and for applying to the set of electrodes an RF voltage(s) configured to generate a radial trapping potential field to radially trap received precursor ions. The voltage source selectively changes the radial trapping potential field to increase the kinetic energy of precursor ions in the ion trapping region so that precursor ions can overcome the potential barrier thereby axially ejecting the selected precursor ions from the linear ion trap. A collision cell is configured to receive the ejected precursor ions and to apply to them a process of collision-induced dissociation to generate product ions therefrom. A mass analyser, such as a time-of-flight, TOF, mass analyser, receives the product ions (and / or any remaining unfragmented precursor ions) and to apply to them a process of mass analysis.

A data-dependent analysis (DDA) mass spectrometry technique involves ionizing a sample to generate sample ions, analyzing the sample ions by performing one or more MS1 mass analysis scans to obtain MS1 ​​data, identifying one or more precursor ions from the MS1 data, and subsequently analyzing the sample ions by performing one or more MS2 mass analysis scans. Each MS2 scan targets one of the one or more precursor ions identified from the MS1 data.The procedure further includes, for each of the one or more precursor ions identified from the MS1 data: determining a value from the MS1 data that is indicative of a collision cross section (CCS) of that precursor ion; and selecting, based on the CCS-indicative value(s), which precursor ion(s) the one or more MS2 bulk analysis scans should target, and / or determining, based on the CCS-indicative value(s), an order in which the one or more MS2 bulk analysis scans should target the precursor ions.

Method and system for calibrating a mass spectrometer having one or more ion lenses and a mass analyser, the method comprising the steps of acquiring from the mass analyser a plurality of mass spectra from a sample, the sample comprising a plurality of ion masses, wherein a voltage value applied to the one or more ion lenses is static while each mass spectrum is obtained and the voltage value is varied between different mass spectra. Determining from the plurality of mass spectra and corresponding voltage applied to the one or more ion lenses during acquisition of each mass spectrum, a voltage value providing an optimum ion signal for each of the plurality of ion masses in the sample. Storing data indicating the ion mass value and corresponding voltage value providing the optimum ion signal for each of the plurality of ion masses in the sample.

Methods for acquiring mass spectral data of a sample across at least a portion of an m / z range include receiving mass spectral data of the sample across the m / z range. The m / z range is partitioned into one or more sets of m / z sub-ranges, each set comprising one or more m / z sub-ranges, by dividing the m / z range into a plurality of m / z bins, determining an indication of ion abundance for each m / z bin, based on the mass spectral data, and forming an m / z sub-range of the one or more sets of m / z sub-ranges by assigning m / z bins having ion abundances that correspond to at least a threshold degree to the formed m / z sub-range. A mass analysis is performed on the sample for each set of m / z sub-ranges, thereby acquiring one or more partial mass spectral data sets.

The application relates to the technical field of mass spectrometers, in particular to an electrode rod for a mass spectrometer and a mass spectrometer. The mass spectrometer comprises a mass analyzer which is axially connected with an ionization cylinder and is connected with a detector through the mass analyzer. An installation base is connected to the inner wall of the lower end of the mass analyzer. A positioning ring coaxial with the mass analyzer is clamped in the inner upper end of the installation base. Four electrode rods are connected in the inner positioning ring and are arranged in rotational symmetry with the central axis of the mass analyzer. A position adjusting assembly for limiting the four electrode rods is arranged between the positioning ring and the four electrode rods. The distance between the four electrode rods is synchronously increased or reduced through the position adjusting assembly. When the applied composite voltage remains unchanged, increasing the distance can make the ion passing space larger, thereby improving the detection sensitivity. Reducing the distance can enhance the electric field constraint, improve the ion screening precision and the resolution capacity, so as to adapt to different detection requirements.

The invention relates to an imaging elemental analyzer for imaging one or more analyte elements in an organic sample, wherein the analyzer comprises: a chamber for receiving an organic sample containing one or more analyte elements to be imaged, wherein the internal chamber pressure surrounding the sample is in the range of 10 -5 up to 10 -2mbar; at least one irradiant selected from: (i) an ion gun for irradiating the sample with a high-intensity primary ion beam, wherein the primary ions are generated in the ion gun at a pressure below 1 mbar, the ion gun serving to focus the primary ion beam onto a localized spot on the sample surface and to move the spot over time to a plurality of locations on the sample surface; (ii) a laser for irradiating a localized spot on the sample surface and to move the spot over time to a plurality of locations on the sample surface; a gas-filled RF ion guide for receiving the generated ions, comprising the elements released from the sample in response to irradiation by the primary ions or the laser, wherein the RF ion guide prevents the propagation of any ions whose m / z values ​​are less than the mass or mass range of the analyte elements;and a time-of-flight (TOF) mass analyzer for recording the ions or reaction products of the secondary ions formed from the RF ion guidance, wherein the TOF mass analyzer is configured for a repetition rate of at least 5 kHz. The invention also relates to a corresponding method and a corresponding device for imaging one or more inorganic, non-volatile elements.

The application discloses a coal body compression mechanics test acoustic emission signal processing method and system, relates to coal and rock mass analysis, and comprises the following steps: collecting acoustic emission original data sets of the whole process of coal body uniaxial compression destruction under the condition of supercritical water coupling; respectively performing time domain processing, frequency domain conversion and space positioning calculation on the original data sets, outputting time domain characteristic parameters, a frequency domain characteristic parameter set and a space position parameter set; fusing the time domain characteristic parameter set, the frequency domain characteristic parameter set and the space position parameter set, establishing a multi-dimensional characteristic data matrix through time synchronization, and analyzing acoustic emission signal rules of different destruction stages of the coal body under the condition of supercritical water coupling. The application improves the recognition accuracy by performing time domain processing, frequency domain conversion and space positioning calculation on the acoustic emission original data set, and solves the problem of low recognition accuracy of the coal body destruction stage under the condition of supercritical water coupling.

The invention provides a mass spectrum detector which comprises a shell, a sample injection device, a gas analysis device, a vacuum device and a control device, the sample injection device comprises a valve terminal, the valve terminal is arranged in the shell and used for being communicated with a to-be-detected sample, the gas analysis device is arranged in the shell and comprises an ion source, a mass analyzer and a detector, and the vacuum device is arranged in the shell and used for being communicated with the to-be-detected sample. The ion source is communicated with the valve terminal, the input end of the mass analyzer is communicated with the ion source, the output end of the mass analyzer is communicated with the detector, the vacuum system is arranged in the shell, the vacuum system is communicated with the mass analyzer, the control device is arranged in the shell, the control device is connected with the detector, and the control device is electrically connected with the ion source, the mass analyzer and the detector. Wherein the valve terminal is used for realizing gas circuit connection and on-off control among a to-be-tested sample, the gas analysis device and the vacuum device. By adopting the scheme, the mounting efficiency of the mass spectrum detector can be improved, the control efficiency of the gas circuit is improved, and the sample injection device is convenient to maintain.

To provide a system for performing multiplexed ion pre-separation for mass spectrometry.SOLUTION: The system includes a pre-separation device for separating the precursor ions into a set of discrete fractions of precursor ions based on a physical property of the precursor ions and for sequentially transmitting a first subset of the discrete fractions of precursor ions included in the set of discrete fractions of precursor ions. The system further includes a mass spectrometer positioned downstream of the pre-separation device for receiving the first subset of the discrete fraction of precursor ions. The mass spectrometer includes an ion storage for accumulating a first population of product ions generated from each discrete fraction of precursor ions included in the first subset of discrete fractions of precursor ions and a mass analyzer for performing mass analysis of the first population of product ions.SELECTED DRAWING: Figure 1

A data processing device (20) for a liquid chromatograph, capable of performing peak tracking regardless of a mass spectrum pattern, is provided with: a storage unit (21) in which first chromatographic data and first mass analysis data for a main detector based on first analysis conditions and second chromatographic data and second mass analysis data for the main detector based on second analysis conditions are stored; a chromatographic peak extraction unit (34) that extracts a first peak and a second peak from the first chromatographic data and the second chromatographic data; a mass-to-charge ratio acquisition unit (35) that acquires the mass-to-charge ratio of ions in the first peak and the mass-to-charge ratio of ions in the second peak; a molecular weight calculation unit (36) that calculates molecular weights on the basis of the mass-to-charge ratio of the first peak and the mass-to-charge ratio of the second peak; and a peak correlation unit (37) that correlates the first peak and the second peak on the basis of the molecular weight of the first peak and the molecular weight of the second peak.

A high-energy ion implantation system has an ion source and mass analyzer to form and analyze an ion beam along a beam path. A first RF LINAC accelerates the ion beam to a first accelerator exit, and a second RF LINAC accelerates the ion beam to a second accelerator exit along the beam path. A first magnet between the first and second RF LINACs alters the beam path along a first plane. A third RF LINAC accelerates the ion beam, and a second magnet between the second and third RF LINACs alters the beam path along a second plane. A beam shaping apparatus defines a shape of the ion beam, and a third magnet between the third RF LINAC beam shaping apparatus alters the beam path along a third plane, where the first, second, and third planes are not coplanar.

The application discloses a high-inert electrostatic dissipation type collision cell device and a mass spectrometer system thereof, comprising a collision cell device, one end of the collision cell device is connected with a first quadrupole mass analyzer, the other end of the collision cell device is connected with a third quadrupole mass analyzer, and a metal flange is assembled at the positions where the collision cell device is connected with the first quadrupole mass analyzer and the third quadrupole mass analyzer.The high-inert electrostatic dissipation type collision cell device and the mass spectrometer system thereof increase a gas path precise regulation and control module, the module can accurately adjust the gas inlet flow, pressure and gas inlet rate of the collision gas according to the type and ion property of the detected sample, cooperates with a gas flow guide structure in the gas chamber shell, realizes uniform distribution of the collision gas in the gas chamber, supports dynamic switching and precise proportioning of the collision gas at the same time, adapts to different collision dissociation requirements, and improves the universality and detection flexibility of the device.

The invention discloses an ion control device and a mass spectrometer, and belongs to the technical field of mass spectrometers, the ion control device has a guide mode, a deflection mode and a pulse release mode, in the guide mode, the ion control device continuously transmits ions generated by an ion source to a first mass analyzer through first electric field configuration, and in the deflection mode, the ion control device continuously transmits the ions generated by the ion source to a second mass analyzer through second electric field configuration. In a pulse release mode, the ion control device firstly enriches ions generated by the ion source through second electric field configuration, then transmits the enriched ions to the second mass analyzer through third electric field configuration, and in a pulse release mode, the ion control device firstly enriches ions generated by the ion source through fourth electric field configuration, and transmits the enriched ions to the second mass analyzer through third electric field configuration. The enriched ions are then synchronously transmitted to a first mass analyzer through a fifth electric field configuration. The ion control device can be used as a universal ion router, the transmission direction and transmission mode of ions are changed through electrical control, high integration of multiple functions is achieved, the instrument structure is remarkably simplified, and the cost is reduced.

The present application provides an ion source and a mass spectrometer that further reduce the dead volume of the connecting portion of a pipe and a capillary. The ion source has a capillary and a pipe. The capillary has a large-diameter portion that forms a capillary upstream end surface on the upstream side, and the large-diameter portion has a large-diameter portion downstream surface on the downstream side. The pipe has a pipe downstream end surface on the downstream side. The capillary holding portion has a hole through which the capillary downstream end surface can pass and a surface on which the large-diameter portion downstream surface can be disposed. The ion source has a pipe holding portion that holds the pipe. The capillary holding portion and the pipe holding portion are configured to connect the capillary and the pipe by bringing the capillary upstream end surface and the pipe downstream end surface into contact.

One aspect of a mass analysis method according to the present invention is a mass analysis method using a mass analysis device capable of performing DDA-based MS / MS analysis, the mass analysis method comprising: detection steps (S1 to S5) for detecting m / z values of peaks continuously observed for a predetermined period of time on the basis of a mass spectrum obtained by repeatedly performing full-spectrum scanning measurement; a registration step (S6) in which the detected m / z value or an m / z range including the m / z value is registered in an excluded ion list; a precursor selection step (S8) for excluding at least the m / z value or the m / z range registered in the excluded ion list from the precursor selection target in the mass spectrum after the mass spectrum is obtained by full-spectrum scanning measurement, and extracting ions that meet a prescribed precursor selection condition; and a measurement step (S9) of performing MS / MS analysis using the extracted ions as precursor ions following the full-spectrum scanning measurement in the precursor selection step.

The present disclosure provides systems / techniques for facilitating machine learning prediction of ion trap filling functions. In various embodiments, a system can access a requested ion population size. In various aspects, the system can cause a mass analyzer to scan using an injection time related to the requested ion population size by an ion trap filling function, where a set of coefficients of the ion trap filling function are predicted by a machine learning model based on current operating parameter configurations of the mass analyzer.

A method of determining the presence of a perfluoroalkyl or polyfluoroalkyl substance (PFAS) or a compound comprising a perfluoro-alkylated substructure in a sample using a charge inversion is provided. The method comprises ionising a sample under negative soft ionisation conditions at atmospheric pressure to produce negatively charged precursor ions, fragmenting precursor ions by interaction with electrons and / or photons to produce positively charged fragments ions, and mass analysing the positively charged fragments ions using a mass analyser so as to produce positive fragment mass spectral data. The method comprises determining whether, in the positive fragment mass spectral data, an ion peak is present that correspond to at least one positively charged fragment ion indicative of the presence of a PFAS or a compound comprising a perfluoro-alkylated substructure in the sample. When it is determined that an ion peak is present that corresponds to at least one positively charged fragment ion indicative of the presence of a PFAS or a compound comprising a perfluoro-alkylated substructure in the sample: the method comprises determining that a PFAS or a compound comprising a perfluoro-alkylated substructure is present in the sample.

To provide an analysis method for estimating the chemical structure of a compound with which the structure of the C=C position on a carbon chain can be estimated even for a cyclic compound.SOLUTION: An analysis method for estimating the chemical structure of a compound includes: a) a pre-processing step of performing pre-processing on a target compound so that a cyclic compound has a linear shape; and b) a mass spectrometry step of irradiating ions of the compound after the pre-processing, with at least one selected from radicals having oxidizing ability, radicals having reducing ability, and ozone to dissociate the ions, and performing mass analysis of fragment ions generated thereby to collect mass information of the fragment ions, wherein information on the ions estimated in a specific fragment ion estimation step is used for estimating the structure of the compound.SELECTED DRAWING: Figure 1

In various aspects, the methods and systems disclosed herein are capable of operating a Fourier transform mass spectrometer (FTMS) quadrupole mass analyzer in two modes of operation: transmission mode and trapped mode. In trapped mode, ions are first trapped and cooled within the FTMS mass analyzer, then subjected to an excitation pulse and ejected from the FTMS mass analyzer for detection. However, in transmission mode, the FTMS mass analyzer can provide faster analysis because the excitation pulse is applied to ions of a beam of ions that are continuously transmitted through the FTMS mass analyzer.

The mass spectrometer includes a storage device and an analyzer. The analyzer includes a mirror, an accelerator that receives ions from the storage device and pulses them onto one of the mirrors, causing the ions to reflect back and forth in a first dimension between the mirrors as the ions drift in the drift dimension, a reflector that reflects the ions in the drift dimension, a detector, and control circuitry that activates the reflector to make multiple passes along the drift dimension and deactivates one of the reflectors so that the ions pass to the detector and can be detected, the timing of the reflector activation and deactivation being such that only ions within a first range of mass-to-charge ratios undergo the same number of passes in the drift dimension at any one time that they are detected by the detector. The control circuitry synchronizes the time of pulses from the storage device with the time of pulses from the ion accelerator so that only ions having a mass-to-charge ratio within the first range are pulsed onto one of the mirrors by the accelerator.

The present disclosure may broadly provide a method for analysing analytes of interest comprising: a) mixing a biomaterial containing a protein target, with one or more candidate compounds for binding to the biomaterials to obtain a sample comprising one or more biomaterial-candidate complexes, b) introducing the sample to a mass spectrometer by ionising the sample under conditions that retain the one or more biomaterial-candidate complex in their native state, c) separating the one or more biomaterial-candidate complex from unbound candidate compounds by selecting for ions having a high mass range using a mass analyser configured to capture the one or more biomaterial-candidate complexes and excluding unbound candidate compounds based on a difference in oscillation frequencies of their respective ions, d) dissociating the biomaterial-candidate complex using collisional dissociation to obtain one or more dissociated candidate compounds, and e) determining the dissociated candidate compound based on mass-to-charge ratio (m / z).

The invention provides a mass analyzer capable of reducing energy divergence, which is sequentially provided with a repulsion electrode, an accelerating electrode and a separation electrode along the flight direction of ions and is used for providing a separation electric field which is arranged along a second direction; the separation electric field is used for reducing the distance between ions with the same mass-to-charge ratio in the ionic group; the separation electric field is also used for increasing the distance between ions with different mass-to-charge ratios in the ionic group; according to the invention, the free flight area is replaced by the separation electrode to generate the separation electric field, and for ions with the same mass number, ions with higher speed can bear smaller electric field force, ions with lower speed can bear larger electric field force, so that the ions with the same mass number can be close to each other; for ions with different mass numbers, the ions with large mass numbers are subjected to relatively small acceleration, and the ions with small mass numbers are subjected to relatively large acceleration, so that the distance between the ions with different mass numbers is increased, and the resolution of the mass analyzer is improved.