A simple potentiometric sensor for rhodamine B
ČlánekOtevřený přístuppeer-reviewedpublishedDatum publikování
2010
Vedoucí práce
Oponent
Název časopisu
Název svazku
Vydavatel
Univerzita Pardubice
Abstrakt
The construction and performance characteristics of PVC electrodes for
Rhodamine B (RB) are described. Different methods for electrode fabrication (modified with
the ion-pair, ion pairing agent or soaking the plain electrode in the ion-pair suspension) have
been used. Matrix compositions were optimized on the basis of effects of type and content of
the modifier as well as influence of the plasticizers. The fabricated electrodes worked
satisfactorily in the concentration range from 1×10-6 to 0.001 M with Nernstian cationic
slopes, depending on the method of electrode fabrication. The ion-pair modified electrode
showed the best performance (slope 56.3±2.0 mV decade-1) compared with the plain
electrodes or modified with sodium tetraphenylborate (NaTPB) and fast response time of
about 8 sec and adequate lifetime (4 weeks). The developed electrodes have been
successfully applied as well as end point indicator electrode for the potentiometric titration
of RB with high accuracy and precision. The solubility products of different RB ion-pair
were determined conductometrically.
Rozsah stran
p. 127-140
ISSN
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Zdrojový dokument
Sensing in electroanalysis. K. Vytřas, K. Kalcher, I. Švancara (Eds.). 2010, Volume 5.
Vydavatelská verze
Přístup k e-verzi
open access
Název akce
ISBN
978-80-7395-348-5 (printed)
978-80-7395-349-2 (on-line)
978-80-7395-349-2 (on-line)
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Klíčová slova
rhodamine B, PVC electrode, potentiometry, solubility products