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    • 7. 发明申请
    • MASS SPECTROMETER
    • 质谱仪
    • WO2007072038A3
    • 2008-03-27
    • PCT/GB2006004892
    • 2006-12-21
    • MICROMASS LTDGREEN MARTIN
    • GREEN MARTIN
    • H01J49/42
    • H01J49/4235H01J49/427
    • An ion trap mass analyser (1) is disclosed comprising a segmented rod set. Ions are trapped radially within the mass analyser by a radial pseudo-potential well. The ions are also confined axially within the ion trap by an axial electric field. The axial electric field is substantially linear across the central section of the iøn trap, but the electric field is distorted across both ends of the ion trap. A supplemental AC voltage or potential is applied to the electrodes comprising the ion trap mass analyser (1) in order to excite resonantly ions within the ion trap (1). The distortions in the electric field at the ends of the ion trap cause the resonant frequency of ions within the ion trap to shift to either a higher or lower frequency. If the frequency of the supplemental AC voltage or potential is scanned appropriately then ions are ejected from the ion trap in a shorter period of time leading to an improvement in mass resolution.
    • 公开了一种离子阱质量分析器(1),其包括分段杆组。 离子通过径向假电位阱在质量分析器内径向捕获。 离子也通过轴向电场轴向限定在离子阱内。 轴向电场横跨i阱陷阱的中心部分基本上是线性的,但电场在离子阱的两端变形。 为了激发离子阱(1)内的共振离子,对包括离子阱质量分析器(1)的电极施加补充AC电压或电位。 离子阱末端的电场畸变导致离子阱内的离子的共振频率向更高或更低的频率移动。 如果适当地扫描补充AC电压或电位的频率,则离子在较短时间内从离子阱排出,导致质量分辨率的提高。
    • 10. 发明申请
    • MASS SPECTROMETER
    • 质谱仪
    • WO2006129094A3
    • 2008-03-06
    • PCT/GB2006001996
    • 2006-06-01
    • MICROMASS LTDBATEMAN ROBERT HAROLDBROWN JEFFERY MARKGREEN MARTINWILDGOOSE JASON LEE
    • BATEMAN ROBERT HAROLDBROWN JEFFERY MARKGREEN MARTINWILDGOOSE JASON LEE
    • H01J49/02G06F19/00H01J49/00
    • H01J49/0036
    • A method of mass spectrometry is disclosed wherein voltage signals from an ion detector are analysed. A second differential of each voltage signal is obtained and the start and end times of observed voltage peaks are determined. The intensity and average time of each voltage peak is then determined and the intensity and time values are stored. An intermediate composite mass spectrum is then formed by combining the intensity and time values which relate to each voltage peak observed from multiple experimental runs. The various pairs of time and intensity data are then integrated to produce a smooth continuum mass spectrum. The continuum mass spectrum may then be further processed by determining the second differential of the continuum mass spectrum. The start and end times of mass peaks observed in the continuum mass spectrum may be determined. The intensity and mass to charge ratio of each mass peak observed in the continuum mass spectrum may then determined. A final discrete mass spectrum comprising just of an intensity value and mass to charge ratio per species of ion may then be displayed or output.
    • 公开了一种质谱法,其中分析了来自离子检测器的电压信号。 获得每个电压信号的第二差分,并且确定观察到的电压峰值的开始和结束时间。 然后确定每个电压峰值的强度和平均时间,并存储强度和时间值。 然后通过组合与多个实验运行中观察到的每个电压峰值相关的强度和时间值来形成中间复合质谱。 然后将各种时间和强度数据对被整合以产生平滑的连续质谱。 然后可以通过确定连续质谱的第二差分来进一步处理连续质谱。 可以确定在连续质谱中观察到的质量峰的开始和结束时间。 然后可以确定在连续质谱中观察到的每个质量峰的强度和质荷比。 然后可以显示或输出包括仅每个离子种类的强度值和质荷比的最终离散质谱。