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    • 1. 发明申请
    • MICROCHIP AND WEDGE ION FUNNELS AND PLANAR ION BEAM ANALYZERS USING SAME
    • 使用相同的微型和离子束离子束和平面离子束分析仪
    • WO2012141771A1
    • 2012-10-18
    • PCT/US2012/021338
    • 2012-01-13
    • BATTELLE MEMORIAL INSTITUTESHVARTSBURG, Alexandre A.ANDERSON, Gordon A.SMITH, Richard D.
    • SHVARTSBURG, Alexandre A.ANDERSON, Gordon A.SMITH, Richard D.
    • H01J49/00H01J49/06
    • H01J49/0018H01J49/066
    • Electrodynamic ion funnels confine, guide, or focus ions in gases using the Dehmelt potential of oscillatory electric field. New funnel designs operating at or close to atmospheric gas pressure are described. Effective ion focusing at such pressures is enabled by fields of extreme amplitude and frequency, allowed in microscopic gaps that have much higher electrical breakdown thresholds in any gas than the macroscopic gaps of present funnels. The new microscopic-gap funnels are useful for interfacing atmospheric-pressure ionization sources to mass spectrometry (MS) and ion mobility separation (IMS) stages including differential IMS or FAIMS, as well as IMS and MS stages in various configurations. In particular, "wedge" funnels comprising two planar surfaces positioned at an angle and wedge funnel traps derived therefrom can compress ion beams in one dimension, producing narrow belt-shaped beams and laterally elongated cuboid packets. This beam profile reduces the ion density and thus space-charge effects, mitigating the adverse impact thereof on the resolving power, measurement accuracy, and dynamic range of MS and IMS analyzers, while a greater overlap with coplanar light or particle beams can benefit spectroscopic methods.
    • 电动离子漏斗使用振荡电场的Dehmelt电位限制,引导或聚焦气体中的离子。 描述了处于或接近大气压力的新漏斗设计。 在这种压力下的有效离子聚焦是通过极大幅度和频率的场来实现的,微观间隙允许在任何气体中具有比当前漏斗的宏观间隙高得多的电击穿阈值。 新的微间隙漏斗可用于将大气压电离源与包括差分IMS或FAIMS的质谱(MS)和离子迁移率分离(IMS)阶段以及各种配置的IMS和MS阶段进行接口。 特别地,包括两个平坦的表面定位成角度的楔形漏斗和从其衍生的楔形漏斗捕获器可以在一个维度上压缩离子束,产生窄的带状波束和横向延伸的立方体分组。 这种光束轮廓降低了离子密度,从而降低了空间电荷效应,减轻了MS和IMS分析仪的分辨率,测量精度和动态范围的不利影响,而与共面光或粒子束的更大重叠可有利于光谱方法 。
    • 6. 发明申请
    • METHOD AND APPARATUS FOR ION MOBILITY SPECTROMETRY WITH ALIGNMENT OF DIPOLE DIRECTION (IMS-ADD)
    • 用于离子交换光谱的方法和装置(IMS-ADD)
    • WO2006105464A1
    • 2006-10-05
    • PCT/US2006/012149
    • 2006-03-30
    • BATTELLE MEMORIAL INSTITUTESHVARTSBURG, Alexandre, A.TANG, KeqiSMITH, Richard, D.
    • SHVARTSBURG, Alexandre, A.TANG, KeqiSMITH, Richard, D.
    • G01N27/64H01J49/40
    • G01N27/624H01J49/004H01J49/40
    • Techniques and instrumentation are described for analyses of substances, including complex samples/mixtures that require separation prior to characterization of individual components. A method is disclosed for separation of ion mixtures and identification of ions, including protein and other macromolecular ions and their different structural isomers. Analyte ions are not free to rotate during the separation, but are substantially oriented with respect to the drift direction. Alignment is achieved by applying, at a particular angle to the drift field, a much stronger alternating electric field that "locks" the ion dipoles with moments exceeding a certain value^ That value depends on the buffer gas composition, pressure, and temperature, but may be as low as ~ 3 Debye under certain conditions. The presently disclosed method measures the direction- specific cross-sections that provide the structural information complementing that obtained from known methods, and, when coupled to those methods, increases the total peak capacity and specificity of gas-phase separations. Simultaneous 2-D separations by direction-specific cross sections along and orthogonally to the ion dipole direction are also possible.
    • 描述了用于分析物质的技术和仪器,包括在表征单个组分之前需要分离的复杂样品/混合物。 公开了用于分离离子混合物和鉴定离子的方法,包括蛋白质和其它大分子离子及其不同的结构异构体。 分离离子在分离期间不能自由旋转,而是基本上相对于漂移方向取向。 通过以特定的角度对漂移场施加更强的交变电场来实现对准,该交变电场以超过一定值的力“锁定”离子偶极子。该值取决于缓冲气体组成,压力和温度,但是 在某些条件下可能低至〜3德拜。 目前公开的方法测量提供与已知方法获得的结构信息互补的方向特异性横截面,并且当与这些方法耦合时,增加气相分离的总峰容量和特异性。 沿垂直于离子偶极方向的方向特定横截面同时进行2-D分离也是可能的。
    • 8. 发明申请
    • RADIAL ARRAYS OF NANO-ELECTROSPRAY IONIZATION EMITTERS AND METHODS OF FORMING ELECTROSPRAYS
    • 纳米电子放电发射体的辐射阵列及形成电沉积的方法
    • WO2010051051A3
    • 2010-09-02
    • PCT/US2009035817
    • 2009-03-03
    • BATTELLE MEMORIAL INSTITUTEKELLY RYANTANG KEQISMITH RICHARD D
    • KELLY RYANTANG KEQISMITH RICHARD D
    • H01J49/16
    • H01J49/167
    • Electrospray ionization emitter arrays, as well as methods for forming electrosprays, are described. The arrays are characterized by a radial configuration of three or more nano- electrospray ionization emitters without an extractor electrode. The methods are characterized by distributing fluid flow of the liquid sample among three or more nano- electrospray ionization emitters, forming an electrospray at outlets of the emitters without utilizing an extractor electrode, and directing the electrosprays into an entrance to a mass spectrometry device. Each of the nano-electrospray ionization emitters can have a discrete channel for fluid flow. The nano-electrospray ionization emitters are circularly arranged such that each is shielded substantially equally from an electrospray-inducing electric field.
    • 描述了电喷雾电离发射器阵列,以及用于形成电喷雾的方法。 阵列的特征在于没有提取器电极的三个或更多个纳米电喷雾电离发射器的径向构型。 所述方法的特征在于在三个或更多个纳米电喷雾电离发射器之间分配液体样品的流体流动,在不使用提取器电极的情况下在发射器的出口处形成电喷雾,并将电喷雾引导到质谱装置的入口。 每个纳米电喷雾电离发射器可以具有用于流体流动的离散通道。 纳米电喷雾电离发射器是圆形布置的,使得每个发射器基本上等同于电喷雾诱导电场屏蔽。