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