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    • 9. 发明授权
    • Atmospheric pressure ion sources
    • 大气压离子源
    • US06593568B1
    • 2003-07-15
    • US09324401
    • 1999-06-02
    • Craig M. WhitehouseBruce A. Andrien, Jr.Michael A. SansoneClement Catalano
    • Craig M. WhitehouseBruce A. Andrien, Jr.Michael A. SansoneClement Catalano
    • B01D5944
    • H01J49/0477H01J49/0404H01J49/044
    • An Atmospheric Pressure Ion (API) source is configured for Electrospray (ES) and Atmospheric Pressure Chemical Ionization (APCI) operating modes. The API source includes a multipurpose heater assembly mounted in the API source chamber. The multipurpose heater supplies heat to the API chamber endplate, bath gas and entrance end of the capillary orifice into vacuum as well as supplying electrical connections to the API source elements. An additional heater is configured at the exit end of the capillary orifice into vacuum. With this configuration, the bath gas, endplate and capillary entrance temperature can be set independent of gas flow rate. The capillary exit and entrance temperatures can be set independently as well. The multipurpose endplate heater combined with the capillary exit heater allows the optimization of API source performance over a wide range of operating conditions and analytical applications.
    • 大气压离子(API)源被配置用于电喷雾(ES)和大气压化学电离(APCI)操作模式。 API源包括安装在API源室中的多用途加热器组件。 多功能加热器将API室端板,浴室气体和毛细孔入口端的热量提供到真空中,并向API源元件提供电气连接。 另外的加热器配置在毛细管孔的出口端进入真空。 通过这种配置,浴气,终板和毛细管入口温度可独立于气体流量设定。 毛细管出口和入口温度也可以独立设置。 多用途终板加热器与毛细管出口加热器相结合,可以在广泛的操作条件和分析应用中优化API源性能。
    • 10. 发明申请
    • ION SPRAY WITH INTERSECTING FLOW
    • 离子喷雾与交联流
    • WO1995019638A2
    • 1995-07-20
    • PCT/CA1995000014
    • 1995-01-09
    • MDS HEALTH GROUP LIMITEDCOVEY, Thomas, R.ANACLETO, Joseph, F.
    • MDS HEALTH GROUP LIMITED
    • H01J49/04
    • H01J49/165G01N30/7246H01J49/044H01J49/0477
    • Liquid from a liquid chromatograph or other sample source, preferably assisted by a high velocity coaxial gas jet, is sprayed through a capillary tube (40') producing a flow in a first direction of charged droplets (50'). A flow of heated gas (60), in a second direction different from the first direction, intersects the droplet flow at a region (64) upstream of an orifice (20'). The flows mix turbulently, with the second flow helping to evaporate the droplets to produce ions and helping to move the evaporating droplets toward the orifice (20'), providing a focusing effect. Ions are drawn through the orifice (20') into a mass analyzer and analyzed. Alternatively the flows of liquid and heating gas can be directed toward each other and at right angles to the axis through the orifice, and the inhaling effect of the orifice can be used to draw droplets toward it, or a third gas flow can be used for this purpose. The heated intersecting gas flow typically provides an increase in sensitivity (ion counts per second) of between 10 and 100 times. Heating the droplet plume also allows controlled desaturation of ions and an increase in the number of charges on them, without degrading the ions.
    • 来自液相色谱仪或其它样品源的液体优选由高速同轴气体射流辅助通过毛细管(40')喷射,产生沿带电液滴(50')的第一方向的流动。 在与第一方向不同的第二方向上的加热气体(60)的流动在孔口(20')上游的区域(64)处与液滴流相交。 流动紊乱地混合,第二流有助于蒸发液滴以产生离子并帮助将蒸发的液滴移向孔口(20'),从而提供聚焦效果。 离子通过孔口(20')被吸入质量分析器并进行分析。 或者,液体和加热气体的流动可以彼此指向并且通过孔口与轴线成直角,并且可以使用孔口的吸入效应来朝向其喷射液滴,或者可以使用第三气流 这个目的 加热的相交气流通常提供10至100倍的灵敏度(每秒离子计数)的增加。 加热液滴羽流还允许控制离子的去饱和和其上的电荷数量的增加,而不降低离子。