Novel Solid-Contact Ion-Selective Microelectrodes for Localized Potentiometric Measurements

被引：33

作者：

Lamaka, Svetlana V. ^{[1
]}

Taryba, Maryna G. ^{[1
]}

Zheludkevich, Mikhail L. ^{[2
]}

Ferreira, Mario G. S. ^{[1
,2
]}

机构：

[1] Univ Tecn Lisboa, Inst Super Tecn, ICEMS, P-1049001 Lisbon, Portugal

[2] Univ Aveiro, CICECO, Dep Ceram & Glass Eng, P-3810193 Aveiro, Portugal

来源：

ELECTROANALYSIS | 2009年 / 21卷 / 22期

关键词：

Solid contact; pH-selective microelectrode; Mg-selective microelectrode; SIET; Response time; Ionophores; Sensors; SCANNING ELECTROCHEMICAL MICROSCOPY; RESPONSE-TIME; MEMBRANE; ELECTRODE; FLUXES;

D O I：

10.1002/elan.200900258

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The design and properties of novel type of solid-contact ionophore-based ion-selective microelectrodes are reported. The microelectrode is based on an insulated needle-shaped metallic wire with an exposed apex. The ion-to-electron transducer is made of poly(3-octylthiophene-2,5-diyl) and placed between an ion-selective membrane and the metallic tip. The ion-selective polyvinyl chloride-based membrane is deposited atop the layer of conductive polymer. The length of the ion-sensitive part of the electrode is less than 10 mu m. pH and Mg2+-selective microelectrodes were constructed and tested showing stable potential and fast response that are essential properties for the practical application of microelectrodes for localized scanning measurements.

引用

页码：2447 / 2453

页数：7

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