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Smart Design for Potentiometric Detection
Author(s) -
Shishkanova Tatiana V.,
Král Vladimir,
Fitl Přemysl,
Vrňata Martin,
Matějka Pavel
Publication year - 2015
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201400553
Subject(s) - potentiometric titration , potentiometric sensor , chemistry , membrane , fourier transform infrared spectroscopy , analytical chemistry (journal) , layer (electronics) , inorganic chemistry , chemical engineering , electrode , chromatography , organic chemistry , biochemistry , engineering
This new design of potentiometric sensor involves 4‐mercaptophenylboronic acid (MPBA) evaporated onto a gold layer sputtered onto the surface of a plasticized poly(vinyl chloride) membrane based on a pH indicator. Fourier‐transform infrared spectroscopy confirms the presence of the pH indicator in close contact with the sputtered gold layer, and the covalent fixing of MPBA molecules onto this gold layer. The changes in pH resulting from the interaction between MBPA and the model saccharide (glucose) are reflected in the changes in the membrane capacitance and the potentiometric signal. The potentiometric sensor responds over the concentration range from 0.3 to 29.7 mM glucose.