A reference electrode based on polyvinyl butyral (PVB) polymer for decentralized chemical measurements

被引：129

作者：

Guinovart, Tomas ^{[1
]}

Crespo, Gaston A. ^{[2
]}

Xavier Rius, F. ^{[1
]}

Andrade, Francisco J. ^{[1
]}

机构：

[1] Univ Rovira & Virgili, Dept Quim Organ & Quim Analit, E-43007 Tarragona, Spain

[2] Univ Geneva, Dept Inorgan & Analyt Chem, CH-1211 Geneva, Switzerland

来源：

ANALYTICA CHIMICA ACTA | 2014年 / 821卷

关键词：

Reference electrode; Decentralized measurements; Solid-contact potentiometric sensors; STATE REFERENCE ELECTRODE; AG/AGCL REFERENCE ELECTRODE; ION-SELECTIVE ELECTRODES; B SURFACE ANTIBODY; SOLID-CONTACT; CARBON NANOTUBES; POTENTIOMETRIC SENSORS; COLLOIDAL AG; MEMBRANE; MATRICES;

D O I：

10.1016/j.aca.2014.02.028

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new solid-state reference electrode using a polymeric membrane of polyvinyl butyral (PVB), Ag/AgCl and NaCl to be used in decentralized chemical measurements is presented. The electrode is made by drop-casting the membrane cocktail onto a glassy carbon (GC) substrate. A stable potential (less than 1 mVdec (1)) over a wide range of concentrations for the several chemical species tested is obtained. No significant influence to changes in redox potential, light and pH are observed. The response of this novel electrode shows good correlation when compared with a conventional double-junction reference electrode. Also good long-term stability (90 +/- 33 mu V/h) and a lifetime of approximately 4 months are obtained. Aspects related to the working mechanisms are discussed. Atomic Force Microscopy (AFM) studies reveal the presence of nanopores and channels on the surface, and electrochemical impedance spectroscopy (EIS) of optimized electrodes show low bulk resistances, usually in the k Omega range, suggesting that a nanoporous polymeric structure is formed in the interface with the solution. Future applications of this electrode as a disposable device for decentralized measurements are discussed. Examples of the utilization on wearable substrates (tattoos, fabrics, etc) are provided. a 2014 Elsevier B.V. All rights reserved.

引用

页码：72 / 80

页数：9

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