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公开(公告)号：US20220187259A1
公开(公告)日：2022-06-16
申请号：US17593109
申请日：2020-06-10
Applicant: DH TECHNOLOGIES DEVELOPMENT PTE. LTD.
Inventor： Lyle Lorrence Burton , Stephen Alexander Tate
Abstract: A separation device is instructed to separate a compound from a sample over a time period. A mass spectrometer is instructed to measure a plurality of intensities of at least one ion of the separated compound over the time period, producing a chromatogram. At least one peak of the at least one ion is identified from the chromatogram using a peak-finding algorithm. Two or more different peak integration areas are calculated for the at least one peak by applying the peak-finding algorithm with two or more different values for at least one peak-finding parameter. Two or more plots of the at least one peak that each shows graphically a different peak integration area are displayed on a display device at the same time. In response, data is received from a user selection device that indicates user selection of one of the two or more plots.
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公开(公告)号：US20180166264A1
公开(公告)日：2018-06-14
申请号：US15576875
申请日：2016-05-26
Applicant: DH Technologies Development Pte. Ltd.
Inventor： Lyle Lorrence Burton , Gordana Ivosev
CPC classification number: H01J49/0036 , G06F19/709 , H01J49/0072
Abstract: One or more known compounds of a sample are ionized. At least one precursor ion corresponding to a compound of the one or more known compounds is selected and fragmented, producing a product ion mass spectrum for the precursor ion. An m/z tolerance probability function that varies from 1 to 0 with increasing values of an m/z difference between two mass peaks and that includes one or more values between 1 and 0 is received. A library product ion mass spectrum for the at least one compound is retrieved from a memory. An m/z difference between at least one experimental product ion mass peak in the product ion mass spectrum and at least one library product ion mass peak in the library product ion mass spectrum is calculated. An m/z tolerance probability that determines if the two peaks are corresponding peaks is calculated from the m/z difference using the probability function.
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公开(公告)号：US11953478B2
公开(公告)日：2024-04-09
申请号：US17593349
申请日：2020-03-10
Applicant: DH TECHNOLOGIES DEVELOPMENT PTE. LTD.
Inventor： Nic G. Bloomfield , Lyle Lorrence Burton , John Lawrence Campbell , David M. Cox , Eva Duchoslav , Adam San-Ho Lau
CPC classification number: G01N30/8631 , G01N30/7206 , G01N30/7233 , H01J49/0031 , H01J49/0418 , H01J49/167 , H01J49/4225 , H01J49/446
Abstract: Each of one or more unknown compounds are separated from a sample over a separation time period. Separated compounds are ionized, producing one or more compound precursor ions for each of the unknown compounds and a plurality of background precursor ions. A precursor ion mass spectrum is measured for the combined compound and background precursor ions at each time step of a plurality of time steps spread across the separation time period, producing a plurality of precursor ion mass spectra. One or more background precursor ions are selected from the plurality of precursor ion mass spectra that have a resolving power in a range below a threshold expected resolving power. A separation time is detected for an unknown compound when a decrease in an intensity measurement of the selected background precursor ions over a time period exceeds a threshold decrease in intensity with respect to time.
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公开(公告)号：US20170092476A1
公开(公告)日：2017-03-30
申请号：US15310845
申请日：2015-05-07
Applicant: DH Technologies Development Pte. Ltd.
Inventor： Eva Duchoslav , Lyle Lorrence Burton , Ronald F. Bonner
CPC classification number: H01J49/0036 , G16C20/90 , H01J49/004
Abstract: At least one product ion mass spectrum produced by a tandem mass spectrometer is received. A chemical structure of a compound that corresponds to the at least one product ion mass spectrum is received. One or more elemental compositions are assigned to at least one peak in the at least one product ion spectrum based on the chemical structure using the processor. At least one elemental composition of the one or more assigned elemental compositions is selected for the at least one peak using the processor. The mass of the at least one peak is converted to the mass of the selected at least one elemental composition using the processor, producing a product ion mass spectrum with higher mass accuracy.
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公开(公告)号：US10825668B2
公开(公告)日：2020-11-03
申请号：US15750557
申请日：2016-08-09
Applicant: DH Technologies Development Pte. Ltd.
Inventor： Lyle Lorrence Burton , David Michael Cox
IPC: H01J49/00
Abstract: One or more known compounds of a sample are ionized using an ion source, producing an ion beam of precursor ions. A tandem mass spectrometer receives the ion beam from the ion source, selects one or more precursor ions from the ion beam using a precursor ion mass selection window, fragments precursor ions within the precursor ion mass selection window, and mass analyzes the resulting product ions, producing an unknown product ion mass spectrum. A library product ion mass spectrum for a known compound is retrieved from a memory. Each peak of the unknown spectrum is analyzed for a potential non-halogen isotopic peak using a processor, and if a potential non-halogen isotopic peak is found, it is removed if it does not have a corresponding peak in the library spectrum.
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Patent Agency Ranking
公开(公告)号：US10115575B2
公开(公告)日：2018-10-30
申请号：US15576875
申请日：2016-05-26
Applicant: DH Technologies Development Pte. Ltd.
Inventor： Lyle Lorrence Burton , Gordana Ivosev
Abstract: One or more known compounds of a sample are ionized. At least one precursor ion corresponding to a compound of the one or more known compounds is selected and fragmented, producing a product ion mass spectrum for the precursor ion. An m/z tolerance probability function that varies from 1 to 0 with increasing values of an m/z difference between two mass peaks and that includes one or more values between 1 and 0 is received. A library product ion mass spectrum for the at least one compound is retrieved from a memory. An m/z difference between at least one experimental product ion mass peak in the product ion mass spectrum and at least one library product ion mass peak in the library product ion mass spectrum is calculated. An m/z tolerance probability that determines if the two peaks are corresponding peaks is calculated from the m/z difference using the probability function.
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公开(公告)号：US12019057B2
公开(公告)日：2024-06-25
申请号：US17593109
申请日：2020-06-10
Applicant: DH TECHNOLOGIES DEVELOPMENT PTE. LTD.
Inventor： Lyle Lorrence Burton , Stephen Alexander Tate
CPC classification number: G01N30/8631 , G01N30/14 , G01N30/7233 , G01N2030/027
Abstract: A separation device is instructed to separate a compound from a sample over a time period. A mass spectrometer is instructed to measure a plurality of intensities of at least one ion of the separated compound over the time period, producing a chromatogram. At least one peak of the at least one ion is identified from the chromatogram using a peak-finding algorithm. Two or more different peak integration areas are calculated for the at least one peak by applying the peak-finding algorithm with two or more different values for at least one peak-finding parameter. Two or more plots of the at least one peak that each shows graphically a different peak integration area are displayed on a display device at the same time. In response, data is received from a user selection device that indicates user selection of one of the two or more plots.
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公开(公告)号：US20220392758A1
公开(公告)日：2022-12-08
申请号：US17754614
申请日：2020-09-22
Applicant: DH TECHNOLOGIES DEVELOPMENT PTE. LTD.
Inventor： Lyle Lorrence Burton
Abstract: First, an MS scan of a mass range of a control sample that does not include a metabolite is performed (601) producing background peak m/z and intensity values for background precursor ions (602). Background peaks are selected for an exclusion list and in the exclusion list an m/z value and an intensity value are included for each background peak (604). Next, an MS scan of the mass range of an experimental sample that does include a metabolite is performed (610) producing peak m/z and intensity values for precursor ions (612). Peaks are selected for a peak list and in the peak list an m/z value and an intensity value are included for each peak (614). Finally, each peak of the peak list that has both an m/z value and an intensity value that correspond to an m/z value and an intensity value of a background peak of the exclusion list is excluded from the peak list (616).
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公开(公告)号：US20220187260A1
公开(公告)日：2022-06-16
申请号：US17593349
申请日：2020-03-10
Applicant: DH TECHNOLOGIES DEVELOPMENT PTE. LTD.
Inventor： Nic G. Bloomfield , Lyle Lorrence Burton , John Lawrence Campbell , David M. Cox , Eva Duchoslav , Adam San-Ho Lau
Abstract: Each of one or more unknown compounds are separated from a sample over a separation time period. Separated compounds are ionized, producing one or more compound precursor ions for each of the unknown compounds and a plurality of background precursor ions. A precursor ion mass spectrum is measured for the combined compound and background precursor ions at each time step of a plurality of time steps spread across the separation time period, producing a plurality of precursor ion mass spectra. One or more background precursor ions are selected from the plurality of precursor ion mass spectra that have a resolving power in a range below a threshold expected resolving power. A separation time is detected for an unknown compound when a decrease in an intensity measurement of the selected background precursor ions over a time period exceeds a threshold decrease in intensity with respect to time.
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公开(公告)号：US11031219B2
公开(公告)日：2021-06-08
申请号：US16310047
申请日：2017-06-09
Inventor： Ronald Francis Bonner , Lyle Lorrence Burton , Gérard Hopfgartner , Gordana Ivosev
Abstract: Systems and methods are disclosed for determining if the dynamic range of quantitation in mass spectrometry can be extended. A DIA method is performed on a sample for a compound of interest at each acquisition time of a plurality of acquisition times. A plurality of product ion spectra are produced for each window of two or more precursor ion mass selection windows. A known product ion of the compound of interest is selected. Two or more XICs are calculated from two or more different precursor ion windows for the known product ion. A ratio of one XIC of the two or more XICs to at least one other XIC of the two or more XICs is calculated. If the ratio is above a threshold, the XIC is used in the quantitation. If not, two or more XICs can be combined into a single XIC that is used for the quantitation.
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