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    • 5. 发明授权
    • Quadrupole mass spectrometer
    • 四极质谱仪
    • US08907274B2
    • 2014-12-09
    • US13983498
    • 2011-02-10
    • Shiro Mizutani
    • Shiro Mizutani
    • H01J49/00H01J49/42H01J49/02
    • H01J49/4215H01J49/022H01J49/421
    • A quadrupole power source which applies a voltage to each electrode (2a-2d) of a quadrupole mass filter (2) receives inputs of an m/z-axis correction coefficient Mcomp1 and a V-voltage correction coefficient Vcomp1 in addition to a power supply controlling voltage Qcont according to the m/z of a target ion. Vcomp1 is a reciprocal of the ratio by which a frequency is changed, while Mcomp1 is the square of the ratio by which the frequency is changed. In a detection gain adjuster section (4C), a multiplier (421) multiplies an output Vdet′ of a V-voltage adjusting amplifier (405) by Vcomp1, whereby the radio-frequency voltage produced by a radio-frequency power supply section (4A) is maintained at the same level even when the set frequency of a signal generator (411) is changed in order to tune an LC resonance circuit.
    • 向四极质量过滤器(2)的每个电极(2a-2d)施加电压的四极电源除了电源之外还接收m / z轴校正系数Mcomp1和V电压校正系数Vcomp1的输入 根据目标离子的m / z控制电压Qcont。 Vcomp1是频率变化的比率的倒数,而Mcomp1是频率变化的比率的平方。 在检测增益调整部(4C)中,乘法器(421)将V电压调节放大器(405)的输出Vdet'乘以Vcomp1,由此由射频电源部(4A)产生的射频电压 )即使当信号发生器(411)的设定频率改变以便调谐LC谐振电路时也被保持在相同的电平。