Development of a generic assay for the determination of total trihydroxybenzoate derivatives based on gold-luminol chemiluminescence
Φόρτωση...
Ημερομηνία
Συγγραφείς
Giokas, D. L.
Christodouleas, D. C.
Vlachou, I.
Vlessidis, A. G.
Calokerinos, A. C.
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
A selective assay for the determination of one of the most important class of phenolic compounds, namely trihydroxybenzoates (monomeric and polymeric compounds having at least one gallate moiety) based on their enhancing effect on the chemiluminogenic reaction between gold ions and luminol is described for the first time. In the presence of trihydroxybenzoate derivatives, the light emission generated when alkaline luminol is oxidized by gold ions is amplified several orders of magnitude compared to other common phenolic compounds which exhibit minor reactivity or no reactivity at all (e.g. hydroxycinnamates, flavonols, benzenediols). Based on this property, the experimental conditions were optimized in order to enable the determination of total trihydroxybenzoates in complex mixtures without resorting to separation techniques. The method was applied to samples of different composition (teas, herbal infusions and wines) with satisfactory analytical features yielding detection limits at the 10(-7) mol L-1 level, intra-day precision of 3.1%, inter-day precision less than 10% and recoveries between 88.7 and 97.6%. The strengths and weaknesses of the method were identified and discussed in relation to its application in real samples. (C) 2012 Elsevier B.V. All rights reserved.
Περιγραφή
Λέξεις-κλειδιά
gallic acid derivatives, trihydroxybenzoates, gold, luminol, flow injection analysis, ionization-mass-spectrometry, radical scavenging activity, flow-injection analysis, l. cv graciano, antioxidant capacity, liquid-chromatography, extraction conditions, cabernet-sauvignon, chemi-luminescence, tea
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000315007700009
http://ac.els-cdn.com/S0003267012018326/1-s2.0-S0003267012018326-main.pdf?_tid=32ddb2f8-356b-11e3-9177-00000aacb35f&acdnat=1381822208_065e0453dd786f5aeb3cae76da44eccf
http://ac.els-cdn.com/S0003267012018326/1-s2.0-S0003267012018326-main.pdf?_tid=32ddb2f8-356b-11e3-9177-00000aacb35f&acdnat=1381822208_065e0453dd786f5aeb3cae76da44eccf
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