Electrocatalysis of sulphide with a cellulose acetate film bearing 2,6-dichlorophenolindophenol. Application to sewage using a fully automated flow injection manifold
Φόρτωση...
Ημερομηνία
Συγγραφείς
Florou, A. B.
Prodromidis, M. I.
Karayannis, M. I.
Tzouwara-Karayanni, S. M.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Elsevier
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Talanta
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
The application of an electrochemical sensor, based on a glassy carbon electrode, modified with a cellulose acetate polymeric film bearing 2,6-dichlorophenolindophenol (CA/DCPI-CME), for flow injection analysis of sulphide, is described. The overall reaction was found to obey a catalytic regeneration mechanism (EC mechanism) and the: electrochemical rate constant k(f) for the electrocatalytic oxidation of sulphide was evaluated. The modified electrodes were mounted in a flow-injection manifold, poised at + 0.08 mV versus Ag/AgCl/3 M KCI at pH 7.25 and utilised for the determination of sulphide in urban waste samples. The proposed method correlates well with a colorimetric method. Parameters such as working pH, sample size, flow rate and temperature were studied. Interferants of various compounds normally present in real samples were also tested. Calibration graphs were linear over the range 0.02-1 mM sodium sulphide for CA/DCPI-CMEs hydrolysed in KOH for 6 min. The throughput was 25 samples per h and the R.S.D. was 1.3% (n = 7) for 0.1 mM sodium sulphide. Recoveries for spiked urban waste samples ranged from 99 to 120%. The sensor remained active for more than 2 weeks under specified conditions. (C) 2000 Elsevier Science B.V. All rights reserved.
Περιγραφή
Λέξεις-κλειδιά
flow electrochemical determination of sulphide, controlled porosity cellulose acetate film, sewage, 2,6-dichlorophenolindophenol, hydrogen-sulfide, sensor, acid
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000087888400012
http://ac.els-cdn.com/S0039914000003891/1-s2.0-S0039914000003891-main.pdf?_tid=a5b0a4c509e5ee6a8f4d27b01c333e80&acdnat=1333037102_0549f8e8e6d69d21f5dd170587a64795
http://ac.els-cdn.com/S0039914000003891/1-s2.0-S0039914000003891-main.pdf?_tid=a5b0a4c509e5ee6a8f4d27b01c333e80&acdnat=1333037102_0549f8e8e6d69d21f5dd170587a64795
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