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    • 4. 发明授权
    • Electro-osmotically driven liquid delivery method and apparatus
    • 电渗驱动液体输送方法和装置
    • US5942093A
    • 1999-08-24
    • US878470
    • 1997-06-18
    • David J. RakestrawDeon S. AnexChao YanRajeev DadooRichard N. Zare
    • David J. RakestrawDeon S. AnexChao YanRajeev DadooRichard N. Zare
    • G01N27/447G01N30/28G01N27/00
    • G01N27/44704G01N2030/285
    • Method and apparatus for controlling precisely the composition and delivery of liquid at sub-.mu.L/min flow rate. One embodiment of such a delivery system is an electro-osmotically driven gradient flow delivery system that generates dynamic gradient flows with sub-.mu.L/min flow rates by merging a plurality of electro-osmotic flows. These flows are delivered by a plurality of delivery arms attached to a mixing connector, where they mix and then flow into a receiving means, preferably a column. Each inlet of the plurality of delivery arms is placed in a corresponding solution reservoir. A plurality of independent programmable high-voltage power supplies is used to apply a voltage program to each of the plurality of solution reservoirs to regulate the electro-osmotic flow in each delivery arm. The electro-osmotic flow rates in the delivery arms are changed with time according to each voltage program to deliver the required gradient profile to the column.
    • 用于以低于L / min流速精确控制液体的组成和输送的方法和装置。 这种输送系统的一个实施例是电渗透驱动的梯度流输送系统,其通过合并多个电渗流而产生具有亚L / min流速的动态梯度流。 这些流动由连接到混合连接器的多个输送臂输送,在该混合连接器中它们混合,然后流入接收装置,优选塔。 多个输送臂的每个入口被放置在相应的溶液储存器中。 多个独立的可编程高压电源用于将多个溶液储存器中的每一个施加电压程序以调节每个输送臂中的电渗流。 输送臂中的电渗流速度根据每个电压程序随时间而改变,以将所需的梯度曲线递送到柱。