Electrochemical study of chemically modified and screen-printed graphite electrodes with [(SbO)-O-V(CHL)(2)]Hex. Application for the selective determination of sulfide
Φόρτωση...
Ημερομηνία
Συγγραφείς
Prodromidis, M. I.
Veltsistas, P. G.
Karayannis, M. I.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
American Chemical Society
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Anal Chem
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
The preparation and electrochemical characterization of graphite electrodes modified with hexadecylpyridinium-bis(chloranilato)-antimonyl(V), [(SbO)-O-V(CHL)(2)]Hex, (CMEs) as well as their behavior as electrocatalysts toward the oxidation of sulfide are described. The self-exchange rate constant k(0) of immobilized [(SbO)-O-V(CHL)(2)]Hex and the effect of the surface coverage were evaluated. [SbVO(CHL)(2)]Hex is a new compound. Synthesis protocol and some identification studies are given. The fabrication of screen-printed electrodes (SPEs) with a mixture of 5% (w/w) [(SbO)-O-V(CHL)(2)]Hex/graphite powder in 1.5% (w/v) ethyl cellulose in 2-butoxyethyl acetate is also described. SPEs, poised at +0.08 mV versus Ag/AgCl, at pH 6.5 were utilized for the determination of sulfide in simulated wastewater samples. Interference of various compounds was also tested. The proposed method correlates well with a colorimetric method. Calibration graphs were linear over the range 0.01-0.7 mM sodium sulfide and the CV was 2.8% (n = 8) for 0.1 mM sodium sulfide. Recovery ranged from 94 to 102%. Both [(SbO)-O-V(CHL)(2)]Hex CMEs and SPE showed very good storage stability. [SbVO(CHL)(2)]Hex CMEs showed poor working stability in contrast to printed electrodes, which operated with no remarkable loss of their initial activity for more than 100 runs.
Περιγραφή
Λέξεις-κλειδιά
potential sweep voltammogram, hydrogen-sulfide, general expression, sensor
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000089178600013
http://pubs.acs.org/doi/pdfplus/10.1021/ac0001784
http://pubs.acs.org/doi/pdfplus/10.1021/ac0001784
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας