High-performance dual-electrode system fabricated with track-etched microporous membrane filters

将微孔膜电极堆叠起来，制成了一种新型的双电极流量传感器。该电极是通过在膜过滤器的两侧溅射铂制成的，膜过滤器的两侧都有光滑的平坦表面和直径均匀的圆柱孔。当样品溶液流过膜电极时进行电解，并且在第一工作电极上产生的分析物瞬间被输送到位于第一工作电极下游的第二工作电极的表面。在这种情况下，样品溶液肯定会流过膜过滤器的孔。结果表明，各电极均实现了高效电解，在较宽的流速范围内，收集效率高达100%。在FIA系统中，对样品溶液的注射也证实了良好的反应。

A new dual-electrode flow sensor has been fabricated by piling the microporous membrane electrodes. The electrode was prepared by sputtering of platinum onto both sides of the membrane filter which contain a smooth flat surface as well as cylindrical pores with uniform diameters. The electrolysis is performed when the sample solution flows through the membrane electrode, and a generated analyte on the first working electrode is instantaneously transported to the surface of second working electrode which is located at the downstream of the first one. In this case, the sample solution surely flows through the pores of the membrane filters. As the result, highly efficient electrolysis was achieved at each electrode, and the collection efficiency values as high as 100% were obtained in the wide range of flow rate. Good responses to the injections of sample solutions were also confirmed in the FIA system.