On-line sorption preconcentration of metals based on mixed micelle cloud point extraction prior to their determination with micellar chemiluminescence - Application to the determination of chromium at ng 1(-1) levels
Φόρτωση...
Ημερομηνία
Συγγραφείς
Paleologos, E. K.
Vlessidis, A. G.
Karayannis, M. I.
Evmiridis, N. P.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Elsevier Masson
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Analytica Chimica Acta
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
The on-line incorporation of cloud point extraction (CPE) to flow injection analysis (FIA) is modified to extract and preconcentrate metal species rapidly, avoiding the formation of hydrophobic complexes, using a mixed micellar medium. Coupling the procedure with chemiluminescence (CL) detection based on the catalytic activity of metal species on the luminol-hydrogen peroxide reaction and enhancing the signal with the presence of a micellar carrier containing bromide ions produces a powerful tool for the preconcentration and determination of metal species at ng l(-1) levels. As an analytical demonstration ultratrace concentrations of chromium were conveniently detected and quantified in samples with a complex matrix such as seawater and wastewater. The figures of merit for the determination of chromium were: 0.9-1.6% R.S.D. (n = 5) with detection and quantification limits 0.5 and 2.0 ng l(-1), respectively. The calibration graph was rectilinear from 2 to 200 ng l(-1) (r = 0.9996, n = 6). Several other metal ions were determined in ideal situations, with analogous results. (C) 2002 Elsevier Science B.V. All rights reserved.
Περιγραφή
Λέξεις-κλειδιά
on-line, cloud point extraction, micellar-enhanced chemiluminescence detection, fia manifold, flow injection, chromium(iii), luminol, atomic-absorption spectrometry, flow-injection analysis, chemi-luminescence, separation approach, ion chromatography, methodology, pyrogallol, oxidation, periodate, systems
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000180437400005
http://ac.els-cdn.com/S0003267002014290/1-s2.0-S0003267002014290-main.pdf?_tid=ab93c5d0-356a-11e3-8202-00000aab0f6b&acdnat=1381821981_ac43df299ea02602da44a64657f1c9df
http://ac.els-cdn.com/S0003267002014290/1-s2.0-S0003267002014290-main.pdf?_tid=ab93c5d0-356a-11e3-8202-00000aab0f6b&acdnat=1381821981_ac43df299ea02602da44a64657f1c9df
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