Microwave-assisted phase-transfer catalysis for the rapid one-pot methylation and gas chromatographic determination of phenolics
Φόρτωση...
Ημερομηνία
Συγγραφείς
Fiamegos, Y. C.
Karatapanis, A.
Stalikas, C. D.
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
Journal of Chromatography A
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
Microwave-assisted phase-transfer catalysis (PTC) is reported for the first time, for the one-step extraction-derivatization-preconcentration and gas chromatographic determination of twenty phenols and ten phenolic acids. The well established phase-transfer catalytic methylation is largely accelerated when heating is replaced with the "greener" microwave irradiation. The overall procedure was thoroughly optimized and the analytes were determined by GC/MS. The method presented adequate analytical characteristics being more sensitive in analyzing phenols than phenolic acids. The limits of detection without any additional preconcentration steps (e.g. solvent evaporation) were adequate and ranged from 0.4 to 15.8 ng/mL while limits of quantitation were between 1.2 and 33.3 ng/mL The method was applied to the determination of phenols, in spiked environmental samples and phenolic acids in aqueous infusions of commercially available pharmaceutical dry plants. The recoveries of fortified composite lake water samples and Mentha spicata aqueous infusions ranged from 89.3% to 117.3% for phenols and 93.3% to 115.2% for phenolic acids. (C) 2009 Elsevier B.V. All rights reserved.
Περιγραφή
Λέξεις-κλειδιά
endocrine disruptors, phenolics, phase-transfer catalysis, microwave irradiation, surface water, aqueous plant extract, mass-selective detection, water samples, trace concentrations, antioxidant activity, bisphenol-a, derivatization, spectrometry, extraction, microextraction, chlorophenols
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000274351600002
http://ac.els-cdn.com/S0021967309018020/1-s2.0-S0021967309018020-main.pdf?_tid=47110956fd9aa99d8de516d28a85598c&acdnat=1333040717_099652ed76ecefd4e0deda4d4f62b443
http://ac.els-cdn.com/S0021967309018020/1-s2.0-S0021967309018020-main.pdf?_tid=47110956fd9aa99d8de516d28a85598c&acdnat=1333040717_099652ed76ecefd4e0deda4d4f62b443
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