کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1164954 1491011 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A reference electrode based on polyvinyl butyral (PVB) polymer for decentralized chemical measurements
ترجمه فارسی عنوان
الکترود مرجع بر پایه پلیمر پی وی سی پی وی سی برای اندازه گیری های غیرمتمرکز شیمیایی
کلمات کلیدی
الکترود مرجع، اندازه گیری های انحصاری، سنسورهای پتانسیومتریک جامد تماس
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• A disposable solid-contact reference electrode for potentiometry is presented.
• The device shows unsensitivity to most ions, redox potential and light.
• Low-cost and good stability, ideal to build disposable potentiometric sensors.
• Nanopores formed in the membrane control the flux of ions with the solution.

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 mV dec−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 μV/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 kΩ 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.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 821, 22 April 2014, Pages 72–80
نویسندگان
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