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    • 3. 发明授权
    • Flowmeter for pressure-driven chromatography systems
    • 用于压力驱动色谱系统的流量计
    • US06460420B1
    • 2002-10-08
    • US09548474
    • 2000-04-13
    • Phillip H. PaulDon W. Arnold
    • Phillip H. PaulDon W. Arnold
    • G01F137
    • G01N30/36B01D15/14B01D15/163G01F1/36G01N2030/324
    • A flowmeter for accurately measuring the flowrate of fluids in high pressure chromatography systems. The flowmeter is a porous bed of a material, the porous bed having a porosity in the range of about 0.1 to 0.6 and a pore size in the range of about 50 nm to 1 &mgr;m, disposed between a high pressure pumping means and a chromatography column. The flowmeter is provided with pressure measuring means at both the inlet and outlet of the porous bed for measuring the pressure drop through the porous bed. This flowmeter system provides not only the ability to measure accurately flowrates in the range of &mgr;L/min to nL/min but also to provide a signal that can be used for a servo loop or feedback control system for high pressure pumping systems.
    • 一种用于精确测量高压色谱系统中流体流量的流量计。 流量计是材料的多孔床,多孔床的孔隙率在约0.1至0.6范围内,孔径在约50nm至1μm的范围内,设置在高压泵送装置和色谱柱之间 。 流量计在多孔床的入口和出口处设有压力测量装置,用于测量通过多孔床的压降。 该流量计系统不仅提供了在muL / min至nL / min的范围内精确测量流量的能力,而且提供了可用于高压泵送系统的伺服回路或反馈控制系统的信号。
    • 7. 发明授权
    • Method for eliminating gas blocking in electrokinetic pumping systems
    • 在动力泵送系统中消除气体阻塞的方法
    • US06287440B1
    • 2001-09-11
    • US09336535
    • 1999-06-18
    • Don W. ArnoldPhillip H. PaulJoseph S. Schoeniger
    • Don W. ArnoldPhillip H. PaulJoseph S. Schoeniger
    • B01D5702
    • F04B53/06F04B19/006
    • A method for eliminating gas bubble blockage of current flow during operation of an electrokinetic pump. By making use of the ability to modify the surface charge on the porous dielectric medium used in electrokinetic pumps, it becomes possible to place electrodes away from the pressurized region of the electrokinetic pump. While gas is still generated at the electrodes they are situated such that the generated gas can escape into a larger buffer reservoir and not into the high pressure region of the pump where the gas bubbles can interrupt current flow. Various combinations of porous dielectric materials and ionic conductors can be used to create pumps that have desirable electrical, material handling, and flow attributes.
    • 一种在电动泵运行过程中消除气流阻塞电流的方法。 通过利用在电动泵中使用的多孔介电介质上的表面电荷的修饰能力,可以将电极放置在电动泵的加压区域之外。 虽然在电极处仍然产生气体,但是它们被定位成使得所产生的气体可以逸出到更大的缓冲容器中,而不会进入泵的高压区域,在该高压区域中气泡可以中断电流。 可以使用多孔介电材料和离子导体的各种组合来产生具有期望的电气,材料处理和流动属性的泵。