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    • 84. 发明授权
    • Ion trap mass spectrometer
    • 离子阱质谱仪
    • US6157030A
    • 2000-12-05
    • US143398
    • 1998-08-28
    • Minoru SakairiTadao MimuraToshihiro IshizukaMasaru TomiokaYasuaki TakadaTakayuki Nabeshima
    • Minoru SakairiTadao MimuraToshihiro IshizukaMasaru TomiokaYasuaki TakadaTakayuki Nabeshima
    • H01J49/42
    • H01J49/424
    • Disclosed is an ion trap mass spectrometer improved to obtain a high sensitivity without the lowering of resolution. By fitting a mesh electrode to an aperture (an ion sampling aperture or an ion extracting aperture) made in endcap electrodes constituting an ion trap mass analysis region, a radio frequency electric field in the mass analysis region is not disturbed even if the diameter of the aperture is set to a large value to heighten ion transmission efficiency. By fitting a shield electrode for preventing collision of ions with an insulated ring constituting an outer wall of the mass analysis region, charging up of the insulated ring is prevented to improve stability of detection signals. Furthermore, by arranging a shield member for shielding stray charged particles detouring through the circumference of the mass analysis region to approach an ion detector, generation of noises based on these stray charged particles is prevented.
    • 公开了一种改进的离子阱质谱仪,可以在不降低分辨率的情况下获得高灵敏度。 通过将网状电极装配到构成离子阱质量分析区域的端盖电极中的孔(离子取样孔或离子提取孔)上,即使直径为 孔径被设定为大的值以提高离子传输效率。 通过安装用于防止离子与构成质量分析区域的外壁的绝缘环碰撞的屏蔽电极,防止了绝缘环的充电以提高检测信号的稳定性。 此外,通过设置用于屏蔽通过质量分析区域的圆周去除杂散带电粒子的屏蔽构件以接近离子检测器,防止了基于这些杂散带电粒子的噪声的产生。
    • 85. 发明授权
    • Mass spectrometer and mass spectrometry method for analyzing compounds
contained in a solution
    • 用于分析溶液中所含化合物的质谱仪和质谱法
    • US6114693A
    • 2000-09-05
    • US299638
    • 1999-04-27
    • Atsumu HirabayashiYukiko HirabayashiMinoru SakairiYasuaki TakadaTakayuki NabeshimaHideaki Koizumi
    • Atsumu HirabayashiYukiko HirabayashiMinoru SakairiYasuaki TakadaTakayuki NabeshimaHideaki Koizumi
    • G01N27/62G01N27/447G01N30/72H01J49/04H01J49/10
    • G01N30/7266H01J49/0468H01J49/167
    • A mass spectrometer comprising a passage through which a sample solution flows, the passage including a capillary having an open tip, the sample solution flowing through the capillary out of the open tip of the capillary, a gas passage which forms a gas flow around the open tip of the capillary, the gas flow spraying the sample solution flowing out of the open tip of the capillary, a first electrode which contacts the sample solution flowing in the passage and applies an electric potential to the sample solution flowing in the passage, a second electrode disposed around the capillary near the open tip of the capillary, the second electrode being downstream from the first electrode with respect to a direction in which the sample solution flows in the passage, there being no gap extending downstream from the open tip of the capillary to the second electrode in a direction in which the sample solution flows out of the open tip of the capillary, the second electrode being electrically isolated from the sample solution flowing in the capillary and applying an electric field to the sample solution flowing in the capillary, and an analyzer which analyzes a mass of gaseous ions formed from the sample solution sprayed by the gas flow.
    • 一种质谱仪,包括样品溶液流过的通道,所述通道包括具有开口尖端的毛细管,所述样品溶液从毛细管的开口尖端流过毛细管,气体通道围绕开口形成气流 毛细管的尖端,气流喷射从毛细管的开口尖端流出的样品溶液,第一电极,其接触在通道中流动的样品溶液,并向在通道中流动的样品溶液施加电位,第二电极 设置在毛细管附近的毛细管周围的电极,第二电极相对于样品溶液在通道中流动的方向从第一电极下游,在毛细管的开口尖端的下游没有间隙 在样品溶液从毛细管的开口尖端流出的方向到第二电极,第二电极是电隔离的 从在毛细管中流动的样品溶液流出并向在毛细管中流动的样品溶液施加电场,以及分析器,其分析由气流喷射的样品溶液形成的气态离子的质量。