ELECTROOSMOSIS - A RELIABLE FLUID PROPULSION SYSTEM FOR FLOW-INJECTION ANALYSIS
ELECTROOSMOSIS - A RELIABLE FLUID PROPULSION SYSTEM FOR FLOW-INJECTION ANALYSIS
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DOI：
10.1021/ac00083a004
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发表时间：
1994-06-01
影响因子：
7.4
通讯作者：
LIU, S
中科院分区：
文献类型：
--
作者：
DASGUPTA, PK;LIU, S
描述了一种基于电渗的流体推进系统。在高电场中操作的电渗泵通过接地接头与其它部件隔离，接地接头是导电的并且允许泵送的流体流体动力地耦合到下游的内容物而没有泄漏。该泵用于单线和双线流动注射分析（FIA）系统。氯离子和铁（III）的测定进行了讨论，作为代表性的例子。实验结果表明，该系统具有良好的重复性（相对标准偏差0.4-0.8%），反映了该泵的稳定性和可靠性。该系统还可以以混合方式操作，首先进行在线预富集（基于毛细管区带电泳中使用的电堆积效应），然后进行FIA。静电泵送的流体可以被流体静力地耦合以推进导电性太强或电阻太大而不能被直接泵送的其他流体。
An electroosmosis based fluid propulsion system is described. The electroosmotic pump, operating in a high electric field, is isolated from other components by a grounding joint that is electrically conductive and permits the pumped fluid to be hydrodynamically coupled to contents downstream without leakage. The pump was used in single- and double-line flow injection analysis (FIA) systems. The determinations of chloride and iron(III) are discussed as representative examples. The experimental results showed excellent reproducibilities (relative standard deviation 0.4-0.8%), reflecting the stability and the reliability of the pump, The system can also be operated in a hybrid manner, On-line preconcentration (based on the electrostacking effect as used in capillary zone electrophoresis) is performed first, followed by FIA. The electrosmotically pumped fluid can be hydrostatically coupled to propel other fluids that are electrically too conductive or too resistive to be directly pumped.