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132 条记录 (耗时 0.017 秒)

    ULTRA HIGH RESOLUTION MASS SPECTROMETRY AND METHODS OF USING THE SAME
    6.
    发明公开
    ULTRA HIGH RESOLUTION MASS SPECTROMETRY AND METHODS OF USING THE SAME 审中-公开
    超高分辨质谱法及其使用方法

    公开(公告)号：EP3268746A1

    公开(公告)日：2018-01-17

    申请号：EP16716082.9

    申请日：2016-03-11

    申请人： Mars, Incorporated

    发明人： MARSHALL, James, W. ,  TAYLOR, Andrew, J.

    IPC分类号： G01N33/68 ,  G01N27/62 ,  G01N33/02 ,  H01J49/38

    CPC分类号： G01N33/6848 ,  G01N33/02 ,  H01J49/0036

    摘要： The presently disclosed subject matter provides methods for analyzing complex mixtures with ultra high resolution mass spectrometry. In particular, the presently disclosed subject matter provides methods for identifying and monitoring the presence of a compound within a complex mixture. In certain embodiments, the method includes providing a sample of the complex mixture; performing mass spectrometry on the sample of the complex mixture to obtain a mass spectrum; and identifying one or more peaks from the mass spectrum corresponding to the compound. In certain embodiments, the sample is obtained during production of the complex mixture, e.g., a pet food product. In certain embodiments, the sample is prepared by a single alcohol/water extraction step.

    ROTATING FIELD MASS AND VELOCITY ANALYZER
    9.
    发明公开
    ROTATING FIELD MASS AND VELOCITY ANALYZER 失效
    分析单元，所有重量和速度的旋转磁场

    公开(公告)号：EP1009516A4

    公开(公告)日：2005-12-14

    申请号：EP97912973

    申请日：1997-10-23

    申请人： CALIFORNIA INST OF TECHN

    发明人： SMITH STEVEN JOEL ,  CHUTJIAN ARA

    IPC分类号： B01D59/44 ,  H01J49/06 ,  H01J49/38 ,  H01J49/42

    CPC分类号： H01J49/421

    摘要： A mass and velocity analyzer (48) has a cell (60) having four walls (62, 64, 66, 68) applied with time dependent RF potentials. The time dependent RF potentials create an RF field effectively rotating in the cell (60). The rotating RF field disperses an incident ion beam (46) accelerated into the cell (60) according to the mass-to-charge ratio and velocity distribution of ions (52) in the ion beam (46). The ions (52) of the ion beam (46) either collide with an ion detector (54) or deflect away from the ion detector (54), depending on the mass-to-charge ratio, RF amplitude and RF frequency.

    Method for calibrating a fourier transform ion cyclotron resonance mass spectrometer
    10.
    发明公开
    Method for calibrating a fourier transform ion cyclotron resonance mass spectrometer 审中-公开
    校准方法，用于一Inonencyklotronresonanz傅里叶变换质谱仪

    公开(公告)号：EP1265269A3

    公开(公告)日：2005-04-06

    申请号：EP02253364.0

    申请日：2002-05-14

    申请人： BATTELLE MEMORIAL INSTITUTE

    发明人： Smith, Richard D. ,  Masselon, Christophe D. ,  Tolmachev, Aleksey

    IPC分类号： H01J49/38

    CPC分类号： H01J49/0009 ,  H01J49/38

    摘要： A method for improving the calibration of a Fourier transform ion cyclotron resonance mass spectrometer wherein the frequency spectrum of a sample has been measured and the frequency ( f ) and intensity ( I ) of at least three species having known mass to charge ( m / z ) ratios and one specie having an unknown ( m / z ) ratio have been identified. The method uses the known ( m / z ) ratios, frequencies, and intensities at least three species to calculate coefficients A, B, and C, wherein the mass to charge ratio of a least one of the three species ( m / z ) i is equal to A f i + B f i 2 + C · G ( I i ) f i Q wherein f i is the detected frequency of the specie, G( I i ) is a predetermined function of the intensity of the specie, and Q is a predetermined exponent. Using the calculated values for A, B, and C, the mass to charge ratio of the unknown specie ( m /z) ii is calculated as the sum of A f ii + B f ii 2 + C·G ( I ii ) f ii Q wherein f ii is the measured frequency of the unknown specie, and ( I ii ) is the measured intensity of the unknown specie.