Nitrate-selective chemically modified field effect transistors for flow-cell applications

Wojciech Wróblewski , Michał Chudy , Artur Dybko


The paper presents studies devoted to the optimization of nitrate-selective membrane composition of CHEMFETs designed for flow-cell system. The influence of the structure of the quaternary ammonium salts and its concentration on the PVC membrane selectivity was investigated. The highest nitrate selectivity and almost theoretical response were obtained for CHEMFETs based on o-NPOE/PVC membranes containing 1\% of symmetrical tetradodecylammonium nitrate. Slightly lower nitrate selectivity of CHEMFETs was obtained using silicon rubber polymer (Siloprene) membrane. However, improved adhesion properties to the gate surface ensured their better durability (at least 3 months) comparing to sensors based on plasticized PVC membranes. Experimental data measured in this work were fitted to Nikolski–Eisenman equation, which simplify the estimation of the calibration curves and the determination of the potentiometric selectivity coefficients.
Author Wojciech Wróblewski (FC / IBC / DM)
Wojciech Wróblewski,,
- Department Of Microbioanalytics
, Michał Chudy (FC / IBC / DM)
Michał Chudy,,
- Department Of Microbioanalytics
, Artur Dybko (FC / IBC / DM)
Artur Dybko,,
- Department Of Microbioanalytics
Journal seriesAnalytica Chimica Acta, ISSN 0003-2670
Issue year2000
Keywords in EnglishChemically modified field effect transistor (CHEMFET), Flow-cell system, Nitrate selectivity, Quaternary ammonium salts, Siloxane membranes
ASJC Classification1607 Spectroscopy; 2304 Environmental Chemistry; 1303 Biochemistry; 1602 Analytical Chemistry
Score (nominal)40
Score sourcejournalList
Publication indicators Scopus Citations = 22; WoS Citations = 19; GS Citations = 18.0; Scopus SNIP (Source Normalised Impact per Paper): 2000 = 1.158; WoS Impact Factor: 2006 = 2.894 (2) - 2007=3.348 (5)
Citation count*18 (2015-06-20)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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