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17.10
Title EN
Authors
Institution
EUROINVENT 2013
PROCEDURE FOR OBTAINING OF A HIGHLY
SELECTIVE POTENTIOMETRIC SENSOR FOR
SILVER ION DETECTION BASED ON PORPHYRIN
IONOPHORE
Eugenia Fagadar-Cosma, Dana Vlascici, Elena Maria Pică,
Otilia Costişor, Viorica Cosma, Liliana Olenic, Otilia
Bizerea
Institute of Chemistry Timisoara of Romanian
Academy; West University of Timişoara,
Technical University from Cluj-Napoca,
National Institute for Research and Development of
Isotopic and Molecular Technologies, Cluj-Napoca.
Patent no. RO 123.447/30.05.2012,
Description
EN
Class no.
The principle of operation of the sensor is based upon the
measurement of the potential developed at the surface of the
silver sensitive membrane based on porphyrin (Figure 1),
determined by the concentration of silver ions in the solution
where in the sensor is immersed.
The electrochemical sensor for silver and the calomel or
Ag/AgCl reference electrode is connected to an
ionmeter/milivoltmeter. The pair of electrodes immersed in
the solution forms an electrochemical cell whose e.m.f. is
practically determined by the concentration of silver ions in
the solution.
1. Environment - Pollution Control
Vertical plan section in a
Ag + - selectiv potentiometric
Sensor. 1 - Body; 2 - Lid; 3 -
Conductive support (copper
tablet); 4 - Ag + - selective
membrane; 5 - Epoxy
resin; 6- Connecting wire
NATIONAL
137