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    • 3. 发明授权
    • On-line liquid sample deposition interface for matrix assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectroscopy
    • 在线液体样品沉积界面,用于基质辅助激光解吸电离 - 飞行时间(MALDI-TOF)质谱
    • US06175112B1
    • 2001-01-16
    • US09083815
    • 1998-05-22
    • Barry L. KargerFrantisek ForetJan Preisler
    • Barry L. KargerFrantisek ForetJan Preisler
    • H01J4900
    • H01J49/0431H01J49/0418
    • A universal interface for continuous on-line liquid sample introduction directly to the time-of-flight mass spectrometer, which can further promote throughput and utility of MALDI-TOF MS, is disclosed. Preferably, the liquid sample includes a matrix, either solid or liquid, for use in matrix-assisted-laser-desorption-ionization, most particularly in a time-of-flight mass spectrometer which can further promote throughput and utility of MALDI-TOF MS. In the method of the invention, the same samples and matrices, both solid and liquid, can be used as in conventional MALDI. In practice of the method of the invention, a solution of sample containing, e.g., peptide and matrix is infused directly into the source chamber of a mass spectrometer at subatmospheric pressure, deposited on a moving sample holder, such as a rotating quartz wheel, and desorbed by, e.g., a nitrogen laser. The method of the invention is particularly amenable to multiplexing, the parallel deposition of multiple samples, e.g., from a capillary array or microchip channels, with subsequent sequential desorption with a scanning laser. This format is particularly useful for high throughput MS analysis.
    • 公开了用于连续在线液体样品直接引入飞行时间质谱仪的通用界面,其可进一步促进MALDI-TOF MS的产量和效用。 优选地,液体样品包括用于基质辅助激光解吸电离的固体或液体基质,最特别是在飞行时间质谱仪中,其可以进一步促进MALDI-TOF MS的通过量和效用 。 在本发明的方法中,可以像常规的MALDI一样使用固体和液体两种相同的样品和基质。 在本发明方法的实践中,将含有例如肽和基质的样品溶液直接注入质谱仪的源室中,沉积在移动的样品架上,例如旋转的石英砂轮,以及 由氮激光器解吸。 本发明的方法特别适合多路复用,例如来自毛细管阵列或微芯片通道的多个样品的平行沉积,随后用扫描激光随后的顺序解吸。 此格式对于高通量MS分析特别有用。
    • 5. 发明授权
    • On-line and off-line deposition of liquid samples for matrix assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectroscopy
    • 用于基质辅助激光解吸电离 - 飞行时间(MALDI-TOF)质谱的液体样品的在线和离线沉积
    • US06825463B2
    • 2004-11-30
    • US10132064
    • 2002-04-25
    • Barry L. KargerFrantisek ForetJan Preisler
    • Barry L. KargerFrantisek ForetJan Preisler
    • H01J4900
    • H01J49/0418G01N1/2214H01J49/0431
    • A universal interface for continuous on-line liquid sample introduction directly to the time-of-flight mass spectrometer, which can further promote throughput and utility of MALDI-TOF MS, is disclosed. Preferably, the liquid sample includes a matrix, either solid or liquid, for use in matrix-assisted-laser-desorption-ionization, most particularly in a time-of-flight mass spectrometer which can further promote throughput and utility of MALDI-TOF MS. In the method of the invention, the same samples and matrices, both solid and liquid, can be used as in conventional MALDI. In practice of the method of the invention, a solution of sample containing, e.g., peptide and matrix is infused directly into the source chamber of a mass spectrometer at subatmospheric pressure, deposited on a moving sample holder, such as a rotating quartz wheel, and desorbed by, e.g., a nitrogen laser. The method of the invention is particularly amenable to multiplexing, the parallel deposition of multiple samples, e.g., from a capillary array or microchip channels, with subsequent sequential desorption with a scanning laser. This format is particularly useful for high throughput MS analysis. Also disclosed is an off-line deposition chamber and a general method of preparing a sample for analysis that results in the homogeneous deposition of small quantities of sample at improved reproducibility on any appropriately configured sample receptor. This format of sample preparation is particularly useful with existing commercial mass spectrometers.
    • 公开了用于连续在线液体样品直接引入飞行时间质谱仪的通用界面,其可进一步促进MALDI-TOF MS的产量和效用。 优选地,液体样品包括用于基质辅助激光解吸电离的固体或液体基质,最特别是在飞行时间质谱仪中,其可以进一步促进MALDI-TOF MS的通过量和效用 。 在本发明的方法中,可以像常规的MALDI一样使用固体和液体两种相同的样品和基质。 在本发明方法的实践中,将含有例如肽和基质的样品溶液直接注入质谱仪的源室中,沉积在移动的样品架上,例如旋转的石英砂轮,以及 由氮激光器解吸。 本发明的方法特别适合多路复用,例如来自毛细管阵列或微芯片通道的多个样品的平行沉积,随后用扫描激光随后的顺序解吸。 此格式对于高通量MS分析特别有用。 还公开了离线沉积室和制备用于分析的样品的一般方法,其导致在任何适当配置的样品受体上以改善的再现性均匀沉积少量样品。 样品制备的这种格式对于现有的商业质谱仪是特别有用的。
    • 7. 发明授权
    • Precise capillary electrophoretic interface for sample collection or
analysis
    • 精确的毛细管电泳界面,用于样品收集或分析
    • US5571398A
    • 1996-11-05
    • US363474
    • 1994-12-23
    • Barry L. KargerFrantisek ForetOdilo M uller
    • Barry L. KargerFrantisek ForetOdilo M uller
    • G01N27/447C25B9/00
    • B01D57/02G01N27/44717G01N27/44721
    • A capillary electrophoretic system and method for accurate and precise post-column manipulation of molecules separated by capillary electrophoresis is disclosed. The system of the invention includes a separation capillary; a detector positioned close to, and preferably less than approximately one cm from the outlet end of the capillary; and a sheath which surrounds and directs a collection buffer over the capillary outlet end. With the detector positioned as described, precise and accurate correlation is possible between detection of the separated components of a sample and their emergence from the capillary. The detector preferably includes optical fibers connected to a spectrophotometric detection method, such as UV detection or fluorescence, including laser induced fluorescence. The sheath collection buffer, the capillary and an electrophoresis buffer reservoir, for supplying buffer to the inlet end of the capillary, are in electrical contact in an electrical circuit and provide the electric field required for separation of a sample of molecules. The separated components of the sample are mixed with collection buffer as they emerge from the outlet end of the capillary. They are then collected into or on any collection device, such as vials, collection capillaries or membranes, or they are transferred to other devices for further analysis, such as mass spectroscopy.
    • 公开了一种用于通过毛细管电泳分离的分子的精确和精确的后柱操作的毛细管电泳系统和方法。 本发明的系统包括分离毛细管; 位于离毛细管出口端近似近似一厘米处的检测器; 以及护套,其围绕毛细管出口端引导收集缓冲液。 利用如上所述定位检测器,可以在检测样品的分离组分和从毛细管出现之间进行精确和准确的相关性。 检测器优选地包括连接到分光光度检测方法的光纤,例如UV检测或荧光,包括激光诱导的荧光。 用于向毛细管的入口端供应缓冲液的鞘收集缓冲液,毛细管和电泳缓冲液储存器在电路中电接触并提供分离样品分子所需的电场。 当样品的分离成分从毛细管的出口端出现时与收集缓冲液混合。 然后将它们收集到任何收集装置中的任何收集装置上,例如小瓶,收集毛细管或膜,或者将它们转移到其他装置进行进一步分析,例如质谱法。
    • 8. 发明授权
    • Siloxandediol coating for capillary electrophoresis and for general
surface modification
    • 用于毛细管电泳和一般表面改性的硅氧烷二醇涂层
    • US5322608A
    • 1994-06-21
    • US994832
    • 1992-12-23
    • Barry L. KargerDieter SchmalzingFrantisek Foret
    • Barry L. KargerDieter SchmalzingFrantisek Foret
    • B01J20/283B01D57/02B01J20/281G01N27/447G01N30/88C25B9/00
    • G01N27/44752
    • A coated microcapillary column for high performance electrophoresis is disclosed. A preferred microcapillary includes a column; a universal sub-layer of coating material that has been highly crosslinked using a crosslinking agent and attached covalently or non-covalently to the column wall; and a variable top layer of a monomer or polymer, preferably crosslinked, attached to the sub-layer. The microcapillary preferably is prepared by covalently bonding a highly crosslinked siloxanediol sub-layer to the inner surface of the microcapillary wall and then causing a mixture of monomers or polymers to react in the bore of the microcapillary to form a top layer. The bilayer coating as used in a microcapillary prevents adsorption of solutes during electrophoresis and eliminates or controls electroosmotic flow. The disclosed coating may also be formed on other kinds of surfaces where similar surface modification is desired. The sub-layer, which can be formed from other siloxane derivatives having two nucleophilic end groups, e.q., diamino or dithiol, may be used independently, or as a base layer for bilayer or even multilayer surface formation.
    • 公开了一种用于高性能电泳的涂层微毛细管柱。 优选的微毛细管包括柱; 已经使用交联剂高度交联并与塔壁共价或非共价附着的涂层材料的通用子层; 以及连接到子层上的优选交联的单体或聚合物的可变顶层。 微毛细管优选通过将高度交联的硅氧烷二醇亚层共价结合到微毛细管壁的内表面,然后使单体或聚合物的混合物在微毛细孔的孔中反应以形成顶层来制备。 在微毛细管中使用的双层涂层防止电泳期间溶质的吸附,并消除或控制电渗流。 所公开的涂层也可以在需要类似表面改性的其它种类的表面上形成。 可以独立地使用具有两个亲核端基的其它硅氧烷衍生物,即二氨基或二硫醇形成的亚层,或作为双层或甚至多层表面形成的基层。