Polymeric membranes conditioning for sensors applications: mechanism and influence on analytes detection
| Autor: | Roberta G. Toro, Josefina Calvo Quintana, Giovanni Li Destri, Ana Rosa Lazo Fraga, Nicoletta Giamblanco, Francesco Punzo |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
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| Zdroj: | Journal of solid state electrochemistry (Internet) 16 (2012): 901–909. doi:10.1007/s10008-011-1456-y info:cnr-pdr/source/autori:A. R. Lazo Fraga, J. Calvo Quintana, G. Li Destri, N. Giamblanco, R. G. Toro, F, Punzo/titolo:Polymeric membranes conditioning for sensors applications:mechanism and influence on analytes detection/doi:10.1007%2Fs10008-011-1456-y/rivista:Journal of solid state electrochemistry (Internet)/anno:2012/pagina_da:901/pagina_a:909/intervallo_pagine:901–909/volume:16 |
| DOI: | 10.1007/s10008-011-1456-y |
| Popis: | In this work, we studied an ion-exchange membrane based on an inert polymer skeleton in which it is dispersed and anchored a molecule with charged groups able to discriminate and bind positive or negatively charged ions present in a sample. In order to be ready to work, electromembranes need a complex procedure called activation or conditioning. Although most of the known literature looks at the subject from an electrochemical point of view, we put forward a structural approach. Membrane conditioning, in fact, is considered a required step to improve sensor performances and to allow the collection of reproducible data. Even if this operation is carefully followed by all the operators working with sensors equipped with a membrane, it looks like that a thoroughly explanation of the working mechanism and a detailed balance of cost and gains has still not been carried out. As a consequence, we suggest a bulk or membrane approach, where the landscape is mainly characterized by the long-range structure of the membrane itself. Our findings suggest that membrane conditioning has to be carried out carefully and the advantages of this pre-treatment can be appreciated especially for very low concentration measurements. The need for the conditioning mainly results from the necessity of a complete permeation of all the different tortuous channels constituting the membrane itself. |
| Databáze: | OpenAIRE |
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