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    • 2. 发明授权
    • Mass spectrometer
    • US09672330B2
    • 2017-06-06
    • US12739335
    • 2007-10-23
    • Shinichi Yamaguchi
    • Shinichi Yamaguchi
    • G01N33/48G06F19/00G01N33/68H01J49/00G06G7/58
    • G06F19/703G01N33/6848H01J49/0027H01J49/004
    • A product ion spectrum is created on the basis of MS2 analysis data respectively obtained for a parent compound and a metabolite (S1 and S2). Additionally, a neutral loss spectrum, in which the mass of each product ion is replaced with a mass difference between the mass of the product ion and that of a precursor ion, is created (S3). Then, a common peak having the same mass on the neutral loss spectrums of both the parent compound and the metabolite is extracted (S4), and a complementary peak appearing on the product ion spectrum of the metabolite is extracted (S5); this peak appears at a position corresponding to the difference between the mass of the common peak and that of the precursor ion. The ion corresponding to the complementary peak is designated as a precursor ion for the next MS3 analysis (S6), and this MS3 analysis is performed (S7). By a dissociation operation, if a portion common to the parent compound and the metabolite is desorbed in the form of a neutral molecule while a different portion remains in the form of an ion, an MS3 analysis in which the ion of the different portion is used as the precursor ion is performed to obtain structural information of a site of metabolism.
    • 5. 发明授权
    • Windowing combined with ion-ion reactions for chemical noise elimination
    • 结合离子离子反应的窗口化学消除噪声
    • US09390238B2
    • 2016-07-12
    • US14365983
    • 2012-11-28
    • DH TECHNOLOGIES DEVELOPMENT PTE. LTD.
    • John Lawrence CampbellYves Le BlancAlexandre V. LobodaIgor Chernushevich
    • H01J49/00G06F19/00
    • G06F19/703H01J49/0031H01J49/004
    • In a first location of a mass spectrometer, a plurality of ionized molecules of an ion source are selected that have mass-to-charge ratios within a mass-to-charge ratio window width. The plurality of selected ionized molecules are transmitted from a first to a second location. Reagent ions are transmitted to the second location to reduce a charge state of one or more of the plurality of selected ionized molecules. A mass analyzer is used to analyze the plurality of reduced ionized molecules and produce a mass spectrum. A compound is identified from a peak of the spectrum that has a mass-to-charge ratio less than or equal to the highest mass-to-charge ratio in the window width if the noise is multiply charged and greater than the highest mass-to-charge ratio in the window width if the noise is singly charged.
    • 在质谱仪的第一位置,选择离子源的多个离子化分子,其具有在质荷比窗口宽度之内的质荷比。 多个选择的电离分子从第一位置传递到第二位置。 试剂离子被传递到第二位置以减少多个选定的电离分子中的一个或多个的电荷状态。 质量分析器用于分析多个还原离子化分子并产生质谱。 如果噪声是多次充电并且大于最高质量 - 到达的质量 - 荷电比,如果光谱的峰值具有小于或等于窗口宽度中的最高质荷比的化合物, 如果噪声被单独充电,则窗口宽度的充电比例。