Method for creating multiply charged ions for MALDI mass spectrometry (ESMALDI)
    3.
    发明申请
    Method for creating multiply charged ions for MALDI mass spectrometry (ESMALDI) 审中-公开
    用于MALDI质谱(ESMALDI)产生多重带电离子的方法

    公开(公告)号:US20080067345A1

    公开(公告)日:2008-03-20

    申请号:US11786849

    申请日:2007-04-14

    申请人: John B. Fenn

    发明人: John B. Fenn

    IPC分类号: B01D59/44

    CPC分类号: H01J49/165 H01J49/0418

    摘要: A method of combining ES (ElectroSpray Ionization) and MALDI (Matrix Assisted Laser Desorption Ionization) to create enhanced MALDI mass spectrometry to be referred to as ESMALDI (ElectroSpray Matrix Assisted Laser Desorption Ionization). ESMALDI technology offers substantial advantages over conventional technology. essentially by combining the high ionization efficiency and multiple charging of ions in ESI with the smaller sample requirements and operational simplicity of MALDI. Biologists should thus be able to achieve higher sensitivity, better protein identification, enhanced quantification potential and enhanced structural information. An additional degree of freedom for ESMALDI MS is flexibility in the choice of solvents that can be used in the ESI component of the process. Substantial differences in ESI behavior can occur with the same analyte or mixture of analytes in different solvents. Such differences often provide clues to the properties of the analyte and its ions which cannot be readily obtained from conventional MALDI experiments.

    摘要翻译: 将ES(电喷雾离子化)和MALDI(基质辅助激光解吸电离)组合以产生增强的MALDI质谱法被称为ESMALDI(电喷雾矩阵辅助激光解吸电离)的方法。 ESMALDI技术比传统技术具有显着的优势。 基本上通过将ESI中的离子的高电离效率和多次充电与MALDI的较小样品要求和操作简便性相结合。 因此,生物学家应该能够实现更高的灵敏度,更好的蛋白质鉴定,增强的量化潜力和增强的结构信息。 ESMALDI MS的额外自由度在选择可用于该过程的ESI组分的溶剂中具有灵活性。 在不同溶剂中,相同的分析物或分析物混合物可能发生ESI行为的显着差异。 这种差异通常提供了从常规MALDI实验中不能容易地获得的分析物及其离子的性质的线索。

    Method for stromal corneal repair and refractive alteration
    4.
    发明授权
    Method for stromal corneal repair and refractive alteration 有权
    基质角膜修复和屈光改变方法

    公开(公告)号:US07579442B2

    公开(公告)日:2009-08-25

    申请号:US10414796

    申请日:2003-04-16

    IPC分类号: A61K38/17 B29C47/02

    CPC分类号: A61L27/24 D04H1/728

    摘要: A method and means of providing stromal repair and improved refractive correction by creating corneal stromal collagen tissue with fibril diameter and spacing that duplicates the optical transmission and diffusion characteristics of natural corneal collagen. The repair method includes implanting the collagen scaffold during laser corneal ablation or other interlamellar surgery to improve visual acuity or to preclude the possibility of ectasia.

    摘要翻译: 通过产生具有原纤维直径和间隔的角膜基质胶原组织来提供基质修复和改进的屈光矫正的方法和手段,其复制天然角膜胶原的光学透射和扩散特征。 修复方法包括在激光角膜消融或其他层间​​手术期间植入胶原支架以改善视力或排除扩张的可能性。

    Method for determining molecular weight using multiply charged ions
    5.
    发明授权
    Method for determining molecular weight using multiply charged ions 失效
    使用多电荷离子测定分子量的方法

    公开(公告)号:US5581080A

    公开(公告)日:1996-12-03

    申请号:US309852

    申请日:1994-09-21

    IPC分类号: B01D59/44 H01J49/04 H01J49/00

    摘要: A production of mass spectra which contain a multiplicity of peaks. The component ions of these peaks, which are multiply charged, are formed by dispersing a solution containing an analyte into a bath gas as highly charged droplets. The analyte is generally a compound of high molecular weight and is of biochemical interest. The methods calculate the molecular weight of the analyte from the measured mass values of the highly charged ions.

    摘要翻译: 产生含有多个峰的质谱。 通过将含有分析物的溶液分散到作为高电荷液滴的浴气中形成这些峰的成分离子,其是多重带电的。 分析物通常是高分子量的化合物,具有生物化学意义。 该方法从高电荷离子的测量质量值计算分析物的分子量。

    Process and apparatus for changing the energy of charged particles
contained in a gaseous medium
    7.
    发明授权
    Process and apparatus for changing the energy of charged particles contained in a gaseous medium 失效
    用于改变包含在气体介质中的带电粒子的能量的方法和装置

    公开(公告)号:US4542293A

    公开(公告)日:1985-09-17

    申请号:US486642

    申请日:1983-04-20

    摘要: A method of changing the energy of charged particles contained in a gas comprises allowing the gas to flow into a region of reduced pressure through a tube like member so that viscous forces exerted on the charged particles by the flowing gas molecules determine the kinetic energy of the charged particles. A potential gradient is maintained along the length of the tube so that the potential energy of the charged particles is changed as they pass through the tube. At the end of the tube a free jet expansion occurs so that the kinetic energy of the charged particles is no longer determined by the flowing gas, so that they can be accelerated to any desired kinetic energy by means of another potential gradient.The invention can be used to interface any high pressure ion source to a magnetic sector mass spectrometer, or to permit the operation of an electrospray ion source with an earthed inlet capillary with either a quadrupole or a magnetic sector mass spectrometer.

    摘要翻译: 改变包含在气体中的带电粒子的能量的方法包括允许气体通过管状部件流入减压区域,使得流动的气体分子施加在带电粒子上的粘性力决定了 带电粒子。 沿着管的长度保持电位梯度,使得带电粒子的势能在它们通过管时被改变。 在管的末端发生自由射流膨胀,使得带电粒子的动能不再由流动的气体决定,从而可以通过另一个电位梯度将其加速到任何所需的动能。 本发明可用于将任何高压离子源连接到磁性部门质谱仪,或允许使用具有四极杆或磁性部门质谱仪的接地入口毛细管操作电喷雾离子源。

    Method for detection and analysis of inorganic ions in aqueous solutions
by electrospray mass spectrometry
    8.
    发明授权
    Method for detection and analysis of inorganic ions in aqueous solutions by electrospray mass spectrometry 失效
    通过电喷雾质谱法检测和分析水溶液中的无机离子的方法

    公开(公告)号:US5523566A

    公开(公告)日:1996-06-04

    申请号:US278032

    申请日:1994-07-20

    IPC分类号: H01J49/04 B01D59/44 H01J49/00

    CPC分类号: H01J49/165

    摘要: An electrospray mass spectrometric method for analyzing an aqueous solution containing inorganic ion species first enhances the signals for small inorganic ions in electrospray mass spectrometric analysis of aqueous solutions by substantially diluting a sample of the aqueous solution with an organic solvent. The method also removes solvent molecules and other ligands from the small inorganic ions formed in electrospray ionization before mass analysis is complete, by appropriate application of electric fields to accelerate the ions so they will have energetic collisions with neutral gas molecules.

    摘要翻译: 用于分析含有无机离子物质的水溶液的电喷雾质谱法首先通过用有机溶剂基本上稀释水溶液样品来增强水溶液的电喷雾质谱分析中的小无机离子的信号。 该方法还可以通过适当地施加电场来加速离子,使其与中性气体分子发生能量碰撞,从质子分析完成之前的电喷雾电离中形成的小无机离子中除去溶剂分子和其它配体。

    Method and apparatus for the mass spectrometric analysis of solutions
    10.
    发明授权
    Method and apparatus for the mass spectrometric analysis of solutions 失效
    解决方案的质谱分析方法和装置

    公开(公告)号:US4531056A

    公开(公告)日:1985-07-23

    申请号:US486645

    申请日:1983-04-20

    摘要: An electrospray ion source for a mass spectrometer capable of generating ions from samples dissolved in a solution comprises a capillary tube through which the said solution is pumped into a first chamber maintained substantially at atmospheric pressure and in which an inert gas is flowing in a direction counter to the flow of the solution, and a small orifice in the end wall of the chamber opposite to and aligned with the capillary. A high potential difference is applied between the capillary and the end wall so that the solution is electrosprayed into the chamber and ions characteristic of the sample are formed. These ions are desolvated to a controllable extent by the inert gas, which may also be heated to improve the efficiency of the process and increase the maximum permissible flow rate of solution. The ions so formed pass through the small orifice into a second chamber maintained at a reduced pressure, and into a mass spectrometer. Alternatively an additional pressure reduction stage can be included, so that the ions pass into a third chamber maintained at a still lower pressure in which the mass spectrometer is situated through a conventional nozzle and skimmer arrangement. The ion source is particularly effective for the production of unfragmented and unsolvated ions from thermally unstable or involatile samples, and may be used as a liquid chromatograph--mass spectrometer interface.

    摘要翻译: 用于能够从溶解在溶液中的样品产生离子的质谱仪的电喷雾离子源包括毛细管,所述溶液通过该毛细管被泵入保持基本上处于大气压的第一室,并且惰性气体沿反方向流动 到溶液的流动,以及在腔室的端壁中与毛细管相对并与毛细管对准的小孔口。 在毛细管和端壁之间施加高电位差,使得溶液电喷雾到室中并形成样品的特征。 这些离子通过惰性气体被解吸到可控程度,惰性气体也可被加热以提高过程的效率并增加溶液的最大允许流速。 如此形成的离子通过小孔进入保持在减压下的第二室,并进入质谱仪。 或者,可以包括另外的减压阶段,使得离子进入维持在更低压力的第三室中,在该压力下质谱仪通过常规喷嘴和分离器排列设置。 离子源对于从热不稳定或非挥发性样品生产未分散和未溶解的离子特别有效,并且可以用作液相色谱 - 质谱仪界面。