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    Radon Gas Detector with Integrated Collection and Processing Functionality
    1.
    发明公开
    Radon Gas Detector with Integrated Collection and Processing Functionality 审中-公开

    公开(公告)号：US20240272119A1

    公开(公告)日：2024-08-15

    申请号：US18444630

    申请日：2024-05-03

    申请人： LIMIN ZHANG

    发明人： LIMIN ZHANG

    IPC分类号： G01N27/62

    CPC分类号： G01N27/62

    摘要： A radon gas detector with integrated collection and processing functionality is presented. The detector features an injection-mode produced plastic semi-enclosed vented ion chamber, facilitating simplified manufacturing processes and reduced production costs. This chamber is utilized for collecting and measuring the volume of positive ions ionized by Alpha particles, serving as indicators of radon gas levels. The main detection chamber comprises a semi-enclosed, plated plastic chamber. During operation, the conductive plated chamber wall is positively charged, while the center rod remains neutral. The center rod collects the positive charge from cations, which, under the influence of the positively charged chamber wall, migrate towards it. This setup enables the detection circuit on the printed circuit board (PCB) to measure the volume of positively charged ions and transmit the signal for further processing.

    Content determination assistance system and content determination assistance method
    2.
    发明授权
    Content determination assistance system and content determination assistance method 有权

    公开(公告)号：US11927575B2

    公开(公告)日：2024-03-12

    申请号：US17431247

    申请日：2020-02-21

    申请人： FRONTIER LABORATORIES LTD.

    发明人： Kazuko Ishida ,  Atsushi Watanabe ,  Chuichi Watanabe

    IPC分类号： G01N30/86 ,  G01N27/62 ,  G01N30/72

    CPC分类号： G01N30/8679 ,  G01N27/62 ,  G01N30/7206

    摘要： There is provided a content determination assistance system capable of efficiently assisting in identifying a mixture that is highly likely to be contained in a sample. The content determination assistance system records characteristic mass spectrum data for each of known compounds. The content determination assistance system extracts the corresponding current-sample mass spectrum from the current-sample mass spectrum data, and detects a high intensity mass spectra from the corresponding current-sample mass spectrum. The content determination assistance system outputs a degree of concordance in the mass spectrum between a known compound subject to determination and a current sample using the characteristic mass spectrum and the high intensity mass spectrum.

    Mass Spectrometer and Mass Spectrometry Method
    4.
    发明公开
    Mass Spectrometer and Mass Spectrometry Method 审中-公开

    公开(公告)号：US20240038515A1

    公开(公告)日：2024-02-01

    申请号：US18265339

    申请日：2021-12-23

    申请人： SHIMADZU CORPORATION

    发明人： Kazutaka MITSUI ,  Hidenori TAKAHASHI

    IPC分类号： H01J49/00 ,  G01N27/62

    CPC分类号： H01J49/005 ,  H01J49/0031 ,  H01J49/0077 ,  G01N27/62

    摘要： Provided is a mass spectrometer including: a reaction chamber (132) into which a precursor ion is introduced; a radical generation part (54) configured to generate a known radical; a radical supply part (5) configured to react the precursor ion with the radical to generate fragment ions and an adduct ion; a measurement control part (63) configured to measure ions including the precursor ion, the fragment ions, and the adduct ion to obtain a mass spectrum; and an accurate mass estimation part (64) configured to specify a peak of the adduct ion by searching a predetermined mass range centered on a mass value obtained by adding a mass of an atom or molecule derived from the radical to a mass obtained from a peak of the precursor ion, and estimate an accurate mass of the precursor ion by subtracting an accurate mass of the atom or molecule from an accurate mass of the peak.

    Mass spectrometer
    5.
    发明授权
    Mass spectrometer 有权

    公开(公告)号：US11869759B2

    公开(公告)日：2024-01-09

    申请号：US17056483

    申请日：2018-05-31

    申请人： SHIMADZU CORPORATION

    发明人： Manabu Ueda

    IPC分类号： H01J49/42 ,  H01J49/06 ,  G01N27/62

    CPC分类号： H01J49/426 ,  G01N27/62 ,  H01J49/063 ,  H01J49/067

    摘要： After performing an analysis on a standard sample for a predetermined time, a plurality of ion optical elements such as an ion guide are sequentially selected one by one, and a direct-current voltage having a polarity different from that at the time of analysis is temporarily applied. Meanwhile, intensity data of ions having a specific m/z are continuously collected. After thus collecting the data, the ratio of the ion intensities before and after application of direct-current voltages having different polarities is calculated for each ion optical element, and it is determined whether or not the ratio is equal to or larger than a predetermined threshold value.

    Predicting molecular collision cross-section using differential mobility spectrometry
    6.
    发明授权
    Predicting molecular collision cross-section using differential mobility spectrometry 有权

    公开(公告)号：US11728152B2

    公开(公告)日：2023-08-15

    申请号：US17814256

    申请日：2022-07-22

    申请人： DH TECHNOLOGIES DEVELOPMENT PTE. LTD. ,  Scott Hopkins

    发明人： John Lawrence Campbell ,  Scott Hopkins

    IPC分类号： H01J49/00 ,  G06N20/20 ,  G01N27/623 ,  G01N27/62

    CPC分类号： H01J49/0036 ,  G01N27/62 ,  G01N27/623 ,  G06N20/20

    摘要： A plurality of known compounds with known CCS values is analyzed using a DMS device. The DMS device determines how the intensities of their transmitted ions vary with different separation voltages (SVs) and compensation voltages (CVs). A machine learning algorithm builds a data model from the known m/z value, known CCS value, and measured pairs of CV and SV values that provide optimal transmission through the DMS device for each of the known compounds. An unknown compound with an unknown CCS value is then analyzed. The DMS device determines how the intensity of its ions varies with the same different SVs and CVs. Finally, the machine learning algorithm predicts the CCS value of the unknown compound from the data model, the known m/z of the unknown compound, and the measured pairs of CV and SV values that provide optimal transmission through the DMS device for the unknown compound.

    ICP MASS SPECTROMETER
    9.
    发明申请
    ICP MASS SPECTROMETER 审中-公开

    公开(公告)号：US20190013192A1

    公开(公告)日：2019-01-10

    申请号：US16065496

    申请日：2016-06-24

    申请人： SHIMADZU CORPORATION

    发明人： Tomohito NAKANO

    IPC分类号： H01J49/04 ,  H01J49/10

    CPC分类号： H01J49/0422 ,  G01N27/62 ,  H01J49/0468 ,  H01J49/105

    摘要： Provided is an ICP mass spectrometer which is able to effectively discharge residual water by limiting the consumption of Ar gas and a fluctuation in supply pressure of an Ar gas source at the time of an Ar gas purge for a coolant system. The ICP mass spectrometer is provided with: a device body part 1; a coolant system 2 that supplies a coolant from a water source 20 to to-be-cooled structure parts including a high-freqency power supply 12, a high-frequency coil 18, and a sample introduction part 13, which need to be cooled; and an Ar gas supply system 3. Intermediate valves V2, V3 are disposed on the downstream side of a main valve V0, a purge gas channel 32 having a purge valve V1, and a meeting point G of the purge gas channel 32. The to-be-cooled structure parts are connected to a cooling-use pipe on the downstream side of the intermediate valves V2, V3. A valve control part 35 in configured to perform intermittent purge control of repeating accumulation and discharge of the Ar gas on the upstream side of the intermediate valves V2, V3 by intermediately opening and closing the intermediate valves V2, V3 where the Ar gas is being sent.