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29 条记录 (耗时 0.031 秒)

    Method and apparatus of mass-correlated pulsed extraction for a time-of-flight mass spectrometer
    12.
    发明授权
    Method and apparatus of mass-correlated pulsed extraction for a time-of-flight mass spectrometer 有权
    飞行时间质谱仪质量相关脉冲提取的方法和装置

    公开(公告)号：US06518568B1

    公开(公告)日：2003-02-11

    申请号：US09589480

    申请日：2000-06-07

    申请人： Viatcheslav V. Kovtoun ,  Robert J. Cotter

    发明人： Viatcheslav V. Kovtoun ,  Robert J. Cotter

    IPC分类号： H01J4840

    CPC分类号： H01J49/40

    摘要： A time-of-flight mass spectrometer includes a sample holder for a sample and an ionizer for ionizing the sample to form ions. A first element is spaced downstream from the sample holder, a second element is spaced downstream from the first element, and a drift region is downstream of the second element. An electric field is established between the sample holder and the first element at a time subsequent to ionizing the sample in order to extract the ions. A time-dependent and mass-correlated electric field is established between at least one of: (a) the first element and the second element, and (b) the sample holder and the first element. In turn, a detector detects the ions.

    摘要翻译： 飞行时间质谱仪包括用于样品的样品保持器和用于电离样品以形成离子的离子发生器。 第一元件与样品保持器的下游间隔开，第二元件与第一元件的下游间隔开，漂移区域位于第二元件的下游。 在电离样品之后的时间，在样品保持器和第一元件之间建立电场以提取离子。 在（a）第一元件和第二元件中的至少一个以及（b）样品保持器和第一元件中的至少一个之间建立时间依赖和质量相关的电场。 反过来，检测器检测离子。

    End cap reflection for a time-of-flight mass spectrometer and method of using the same
    13.
    发明授权
    End cap reflection for a time-of-flight mass spectrometer and method of using the same 失效
    飞行时间质谱仪的端盖反射及其使用方法

    公开(公告)号：US5814813A

    公开(公告)日：1998-09-29

    申请号：US677033

    申请日：1996-07-08

    申请人： Robert J. Cotter ,  Timothy J. Cornish

    发明人： Robert J. Cotter ,  Timothy J. Cornish

    IPC分类号： G01N27/62 ,  B01D59/46 ,  H01J49/02 ,  H01J49/06 ,  H01J49/40 ,  B01D59/44 ,  H01J49/00

    CPC分类号： H01J49/405

    摘要： A reflectron for use with a mass spectrometer that focuses ions having different energies contains a conductive end cap that is electrically connected to a first voltage. A conductive surface is electrically isolated from the end cap and connected to a second voltage. This conductive surface cooperates with the conductive end cap to establish an inner region in which a non-linear electric field exists. As a result, ions having different energies enter and exit the inner region at a common opening and, when within the inner region, are reflected without penetrating past the conductive surface.

    摘要翻译： 用于聚焦具有不同能量的离子的质谱仪的反射器包含电连接到第一电压的导电端盖。 导电表面与端帽电隔离并连接到第二电压。 该导电表面与导电端盖配合以建立存在非线性电场的内部区域。 结果，具有不同能量的离子在公共开口处进入和离开内部区域，并且在内部区域内被反射而不穿过导电表面。

    Method and apparatus for trapping ions by increasing trapping voltage during ion introduction
    14.
    发明授权
    Method and apparatus for trapping ions by increasing trapping voltage during ion introduction 失效
    在离子引入期间通过增加捕获电压来捕获离子的方法和装置

    公开(公告)号：US5399857A

    公开(公告)日：1995-03-21

    申请号：US68697

    申请日：1993-05-28

    申请人： Vladimir M. Doroshenko ,  Robert J. Cotter

    发明人： Vladimir M. Doroshenko ,  Robert J. Cotter

    IPC分类号： H01J49/42

    CPC分类号： H01J49/4295 ,  H01J49/164 ,  H01J49/424

    摘要： A method and apparatus for trapping ions in an ion trap having a ring electrode and a plurality of end-cap electrodes. Ions are introduced into a ion trap cavity of the ion trap from an external source or by desorption of a substance in the ion trap cavity. In a first embodiment, as the ions are introduced in the ion trap cavity, the amplitude of an RF voltage being applied to the ring electrode is gradually increased to trap the ions in the ion trap cavity. In a second embodiment, as the ions are introduced in the ion trap cavity, a retarding voltage is applied to the end-caps to reduce the initial kinetic energy of the ions. In a third embodiment, as the ions are introduced in the ion trap cavity from a probe tip inserted in the cavity, a retarding voltage is applied to the probe tip.

    摘要翻译： 一种用于在具有环形电极和多个端帽电极的离子阱中捕获离子的方法和装置。 离子从外部源引入离子阱的离子阱空穴中或者通过物质在离子阱腔中的解吸引入。 在第一实施例中，当离子被引入离子阱腔中时，施加到环形电极的RF电压的幅度逐渐增加以捕获离子陷阱腔中的离子。 在第二实施例中，当离子被引入离子阱腔中时，延迟电压被施加到端帽以减小离子的初始动能。 在第三实施例中，当离子从插入空腔中的探针尖端引入到离子阱腔中时，延迟电压被施加到探针尖端。

    Tandem time-of-flight mass spectrometer
    18.
    发明授权
    Tandem time-of-flight mass spectrometer 失效
    TANDEM飞行时间质谱仪

    公开(公告)号：US5202563A

    公开(公告)日：1993-04-13

    申请号：US700697

    申请日：1991-05-16

    申请人： Robert J. Cotter ,  Timothy J. Cornish

    发明人： Robert J. Cotter ,  Timothy J. Cornish

    IPC分类号： G01N27/62 ,  H01J49/40

    CPC分类号： H01J49/004 ,  H01J49/406

    摘要： A tandem time-of-flight mass spectrometer comprises a grounded vacuum housing, two reflecting-type mass analyzers coupled via a collision chamber, and flight channels electrically floated with respect to the grounded vacuum housing. The first reflecting-type mass analyzer receives ionized molecules (ions). These ions pass through the flight channel of the first reflecting-type mass analyzer and are fragmented in the collision chamber. The fragmented ions pass through the flight channel of the second reflecting-type mass analyzer. Detectors disposed in the collision chamber and in the second reflecting-type mass analyzer detect the spectrum of the first reflecting-type mass analyzer and the spectra of the tandem time-of-flight mass analyzer, respectively.

    摘要翻译： 串联飞行时间质谱仪包括接地的真空壳体，通过碰撞室耦合的两个反射型质量分析器和相对于接地的真空壳体浮动的飞行通道。 第一反射型质量分析仪接收电离分子（离子）。 这些离子通过第一反射型质量分析器的飞行通道并在碰撞室中分段。 碎片离子通过第二反射型质量分析仪的飞行通道。 设置在碰撞室中的检测器和第二反射型质量分析器分别检测第一反射型质量分析器的光谱和串联飞行时间质量分析器的光谱。

    Process for the preparation of polycarbonate and/or polyarylate block copolymers with poly(aryl ethers)
    19.
    发明授权
    Process for the preparation of polycarbonate and/or polyarylate block copolymers with poly(aryl ethers) 失效
    用聚（芳基醚）制备聚碳酸酯和/或聚芳酯嵌段共聚物的方法

    公开(公告)号：US5159028A

    公开(公告)日：1992-10-27

    申请号：US700489

    申请日：1991-05-15

    申请人： Markus Matzner ,  George T. Kwiatkowski ,  Robert A. Clendinning ,  Selvaraj Savariar ,  Mohammad J. El-Hibri ,  Charles N. Merriam ,  Robert J. Cotter

    发明人： Markus Matzner ,  George T. Kwiatkowski ,  Robert A. Clendinning ,  Selvaraj Savariar ,  Mohammad J. El-Hibri ,  Charles N. Merriam ,  Robert J. Cotter

    IPC分类号： C08G81/00

    CPC分类号： C08G81/00

    摘要： The invention describes a novel process for the preparation of polycarbonate and/or polyarylate block copolymers with poly(aryl ethers). The process is comprised of the steps:(a) the reaction of a dihydroxy-terminated poly(aryl ether) oligomer with a high molecular weight polycarbonate, or a high molecular weight polyarylate, or a high molecular weight poly(arylate-carbonate) to yield a block copolymer; followed by(b) the coupling of the material obtained in step (a) to the required molecular weight, using a diaryl ester of carbonic acid or of a dicarboxylic acid.Both steps are performed in the presence of a catalyst. The copolymerizations can be run in bulk under vacuum in a single or twin screw extruder. Using the above conditions high molecular weight, high quality block copolymers having a combination of excellent properties are obtained in a matter of minutes.

    摘要翻译： 本发明描述了用聚（芳基醚）制备聚碳酸酯和/或聚芳酯嵌段共聚物的新方法。 该方法包括以下步骤：（a）二羟基封端的聚（芳基醚）低聚物与高分子量聚碳酸酯或高分子量聚芳酯或高分子量聚芳基酯 - 碳酸酯的反应与 得到嵌段共聚物; （b）使用碳酸或二羧酸的二芳基酯将步骤（a）中获得的材料与所需的分子量的偶联。 两个步骤都在催化剂存在下进行。 共聚可以在单螺杆或双螺杆挤出机中在真空下大量运行。 使用上述条件可以在几分钟内获得具有优异性能的组合的高分子量的高质量嵌段共聚物。