Deflecting light into resonant cavities for spectroscopy
    42.
    发明授权
    Deflecting light into resonant cavities for spectroscopy 失效
    将光偏转成谐振腔用于光谱学

    公开(公告)号:US5815277A

    公开(公告)日:1998-09-29

    申请号:US949242

    申请日:1997-10-10

    CPC classification number: G01J3/10 G01J3/42 G01N21/39

    Abstract: Light is coupled into a cavity ring down spectroscopy (CRDS) resonant cavity using an acousto-optic modulator. The AOM allows in-coupling efficiencies in excess of 40%, which is two to three orders of magnitude higher than in conventional systems using a cavity mirror for in-coupling. The AOM shutoff time is shorter than the roundtrip time of the cavity. The higher light intensities lead to a reduction in shot noise, and allow the use of relatively insensitive but fast-responding detectors such as photovoltaic detectors. Other deflection devices such as electro-optic modulators or elements used in conventional Q-switching may be used instead of the AOM. The method is particularly useful in the mid-infrared, far-infrared, and ultraviolet wavelength ranges, for which moderately reflecting input mirrors are not widely available.

    Abstract translation: 使用声光调制器将光耦合到空腔环形光谱(CRDS)谐振腔中。 AOM允许超过40%的耦合效率,这比使用用于耦合的腔镜的常规系统高两到三个数量级。 AOM关闭时间比空腔的往返时间短。 较高的光强度导致散粒噪声的降低,并且允许使用相对不敏感但快速响应的检测器,例如光伏检测器。 可以使用诸如电光调制器或常规Q开关中使用的元件的其它偏转装置来代替AOM。 该方法在中红外线,远红外线和紫外线波长范围内特别有用,对于中等反射输入反射镜不能广泛使用。

    Capillary electrophoretic device employing structure permitting
electrical contact through ionic movement
    44.
    再颁专利
    Capillary electrophoretic device employing structure permitting electrical contact through ionic movement 失效
    采用结构允许通过离子运动进行电接触的毛细管电泳装置

    公开(公告)号:USRE35102E

    公开(公告)日:1995-11-28

    申请号:US149024

    申请日:1993-11-08

    CPC classification number: G01N27/4473

    Abstract: A capillary tube has a structure in its wall that permits ions to flow but no substantial amount of electrolyte to move therethrough. The structure therefore permits electrical contact between the electrolyte inside the tube and the outside environment without diluting the electrolyte. The structure forms only a small part of the side wall so that the tube retains its structural integrity and can be used in electrophoresis without requiring structural support. In the preferred embodiment, the structure is formed by drilling a hole in the side wall, filling the hole with glass powder and fused silica and heating the mixture to form a frit structure to plug the hole. The frit structure permits ions to flow but substantially no electrolyte to move therethrough. Electrophoretic samples exiting from the end of the tube are not diluted and can be continuously collected, such as on top of a moving plate.

    Abstract translation: 毛细管在其壁上具有允许离子流动但没有相当数量的电解质从其中移动的结构。 因此,该结构允许管内的电解质与外部环境之间的电接触,而不会稀释电解质。 该结构仅形成侧壁的一小部分,使得管保持其结构完整性并且可以用于电泳而不需要结构支撑。 在优选实施例中,通过在侧壁中钻孔,通过玻璃粉末和熔融二氧化硅填充孔,并加热混合物以形成玻璃料结构以堵塞孔而形成结构。 玻璃料结构允许离子流动但基本上没有电解质通过其移动。 从管末端出来的电泳样品不被稀释,可以连续收集,例如在移动板的顶部。

    End-column conductivity detector for capillary zone electrophoresis
    46.
    发明授权
    End-column conductivity detector for capillary zone electrophoresis 失效
    用于毛细管区带电泳的末端柱电导检测器

    公开(公告)号:US5298139A

    公开(公告)日:1994-03-29

    申请号:US771345

    申请日:1991-10-04

    CPC classification number: G01N27/4473

    Abstract: An end-column conductivity detector is described. A sensing electrode is placed in the outlet end of a capillary that has a hole in its side wall through which electrolyte moves past the sensing electrode into a reservoir that contains the ground electrode. This structure is simple to construct, has almost no dead volume, and minimizes electrolyte contact with adhesives used to mount the sensing electrode. The end-column conductivity detector is operated in conjunction with a commercial capillary zone electrophoresis system that has a capillary cartridge and a UV absorption detector. This design thus permits sequential measurement of the absorption and conductivity characteristics of separated analyte zones. When a species can be detected by both conductivity and UV absorption, then the absorption coefficient can be determined from the relation between the conductivity signal and the concentration of the species.

    Abstract translation: 描述端柱电导率检测器。 感测电极放置在毛细管的出口端,毛细管在其侧壁上具有一个孔,电解质通过该孔通过感测电极移动到包含接地电极的储存器中。 该结构易于构造,几乎没有死体积,并且最小化与用于安装感测电极的粘合剂的电解质接触。 端柱电导率检测器与具有毛细管柱和UV吸收检测器的商业毛细管区带电泳系统结合操作。 因此,该设计允许连续测量分离的分析物区域的吸收和电导率特性。 当通过电导率和紫外吸收检测物种时,吸收系数可以根据电导率信号与物种浓度之间的关系来确定。

    Method and apparatus for continuous sample ice matrix production for
laser desorption in mass spectrometry
    47.
    发明授权
    Method and apparatus for continuous sample ice matrix production for laser desorption in mass spectrometry 失效
    用于质谱联用激光解吸的连续样品冰基质生产方法和装置

    公开(公告)号:US5171989A

    公开(公告)日:1992-12-15

    申请号:US826924

    申请日:1992-01-24

    CPC classification number: H01J49/0431 H01J49/0404 G01N2030/008 G01N30/724

    Abstract: A method and apparatus for continuously introducing samples for mass spectrometry analysis which comprises providing sample molecules in an aqueous solution containing one or more organic solvents, preferably ethylene glycol, introducing said aqueous solution into the vacuum chamber of an ion source to enable said solution to solidify into a thread of solid matrix, and exposing the solid matrix to a source of energy to desorb sample molecules to be analyzed. The desorbed molecules are then photoionized and focused into a mass spectral analysis zone. The technique is suitable for interfacing liquid chromatographic separation techniques.

    Abstract translation: 一种用于连续引入用于质谱分析的样品的方法和装置,其包括在含有一种或多种有机溶剂,优选乙二醇的水溶液中提供样品分子,将所述水溶液引入离子源的真空室中,以使所述溶液固化 成为固体基质线,并将固体基质暴露于能量来解吸待分析的样品分子。 解吸后的分子然后被光电离并聚焦到质谱分析区。 该技术适用于液相色谱分离技术的接口。

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