Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Copper complexing capacity and trace metal content in common and balsamic vinegars: Impact of organic matter
Δημιουργός/Συγγραφέας:	Karavoltsos, Sotirios Sakellari, Aikaterini Sinanoglou, Vassilia J [EL] Ζουμπουλάκης, Παναγιώτης[EN] Zoumpoulakis, Panagiotis Plavšić, Marta Dassenakis, Manos Kalogeropoulos, Nick
Ημερομηνία:	2020-02-15
Γλώσσα:	Αγγλικά
ISSN:	1420-3049
DOI:	10.3390/molecules25040861
Άλλο:	32075327
Περίληψη:	Complex formation is among the mechanisms affecting metal bioaccessibility. Hence, the quantification of organic metal complexation in food items is of interest. Organic ligands in solutions of environmental and/or food origin function as buffering agents against small changes in dissolved metal concentrations, being able to maintain free metal ion concentrations below the toxicity threshold. Organic matter in vinegars consists of bioactive compounds, such as polyphenols, Maillard reaction endproducts, etc., capable of complexing metal ions. Furthermore, transition metal ions are considered as micronutrients essential for living organisms exerting a crucial role in metabolic processes. In this study, differential pulse anodic stripping voltammetry (DPASV), a sensitive electrochemical technique considered to be a powerful tool for the study of metal speciation, was applied for the first time in vinegar samples. The concentrations of Cu complexing ligands (LT) in 43 vinegars retailed in Greece varied between 0.05 and 52 μM, with the highest median concentration determined in balsamic vinegars (14 μM), compared to that of common vinegars (0.86 μM). In 21% of the vinegar samples examined, LT values were exceeded by the corresponding total Cu concentrations, indicating the presence of free Cu ion and/or bound within labile inorganic/organic complexes. Red grape balsamic vinegars exhibited the highest density of Cu ligands per mass unit of organic matter compared to other foodstuffs such as herbal infusions, coffee brews, and beers. Among the 16 metals determined in vinegars, Pb is of particular importance from a toxicological point of view, whereas further investigation is required regarding potential Rb biomagnification.
Τίτλος πηγής δημοσίευσης:	Molecules (Basel, Switzerland)
Τόμος/Κεφάλαιο:	25
Τεύχος:	4
Σελίδες:	861
Θεματική Κατηγορία:	[EL] Χημεία (Γενικά)[EN] Chemistry (General) [EL] Χημική Βιολογία[EN] Chemical Biology [EL] Ανόργανη χημεία[EN] Inorganic chemistry [EL] Οργανική χημεία[EN] Organic chemistry [EL] Βιοτεχνολογία[EN] Biotechnology
Λέξεις-Κλειδιά:	Copper complexation Organic ligands Trace metals Vinegars Acetic Acid Beer Cations, Divalent Coffee Coordination Complexes Copper Electrochemical Techniques Food Analysis Greece Humans Hydrogen-Ion Concentration Polyphenols Trace Elements
Κάτοχος πνευματικών δικαιωμάτων:	Copyright © 2020 by the authors. Licensee MDPI, Basel, Switzerland
Ηλεκτρονική διεύθυνση περιοδικού (link) :	https://www.mdpi.com/journal/molecules
Εμφανίζεται στις συλλογές:	Ινστιτούτο Χημικής Βιολογίας - Επιστημονικό έργο